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685774453225 = 521922323792
BaseRepresentation
bin10011111101010110101…
…01111011100111101001
32102120002210121202011011
421332223111323213221
542213431230000400
61243012422303521
7100355062450141
oct11765325734751
92376083552134
10685774453225
11244920889874
12b0aa8587ba1
134c88c1caa44
1425297cb9921
1512c8a2708ba
hex9fab57b9e9

685774453225 has 81 divisors (see below), whose sum is σ = 940670713143. Its totient is φ = 495835512480.

The previous prime is 685774453219. The next prime is 685774453249. The reversal of 685774453225 is 522354477586.

The square root of 685774453225 is 828115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 246878803161 + 438895650064 = 496869^2 + 662492^2 .

It is not a de Polignac number, because 685774453225 - 25 = 685774453193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685774453225.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1809431086 + ... + 1809431464.

Almost surely, 2685774453225 is an apocalyptic number.

685774453225 is the 828115-th square number.

685774453225 is the 414058-th centered octagonal number.

It is an amenable number.

685774453225 is a deficient number, since it is larger than the sum of its proper divisors (254896259918).

685774453225 is an equidigital number, since it uses as much as digits as its factorization.

685774453225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 426 counting only the distinct ones).

The product of its digits is 56448000, while the sum is 58.

The spelling of 685774453225 in words is "six hundred eighty-five billion, seven hundred seventy-four million, four hundred fifty-three thousand, two hundred twenty-five".

Divisors: 1 5 19 23 25 95 115 361 379 437 475 529 575 1805 1895 2185 2645 7201 8303 8717 9025 9475 10051 10925 13225 36005 41515 43585 50255 136819 143641 165623 180025 190969 200491 207575 217925 251275 684095 718205 828115 954845 1002455 2729179 3146837 3303743 3420475 3591025 3809329 4140575 4774225 5012275 13645895 15734185 16518715 19046645 51854401 62771117 68229475 72377251 75986089 78670925 82593575 95233225 259272005 313855585 361886255 379930445 1192651223 1296360025 1443735691 1569277925 1809431275 1899652225 5963256115 7218678455 27430978129 29816280575 36093392275 137154890645 685774453225