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681123570 = 23541553759
BaseRepresentation
bin101000100110010…
…001111011110010
31202110122122212220
4220212101323302
52343331423240
6151330501510
722610312001
oct5046217362
91673578786
10681123570
1131a527246
12170134896
13ab1604ca
1466662c38
153ebe45d0
hex28991ef2

681123570 has 32 divisors (see below), whose sum is σ = 1674570240. Its totient is φ = 177202560.

The previous prime is 681123563. The next prime is 681123629. The reversal of 681123570 is 75321186.

681123570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275650 + ... + 278109.

It is an arithmetic number, because the mean of its divisors is an integer number (52330320).

Almost surely, 2681123570 is an apocalyptic number.

681123570 is an abundant number, since it is smaller than the sum of its proper divisors (993446670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681123570 is a wasteful number, since it uses less digits than its factorization.

681123570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553810.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 681123570 is about 26098.3442003511. The cubic root of 681123570 is about 879.8499959539.

It can be divided in two parts, 6811 and 23570, that added together give a triangular number (30381 = T246).

The spelling of 681123570 in words is "six hundred eighty-one million, one hundred twenty-three thousand, five hundred seventy".

Divisors: 1 2 3 5 6 10 15 30 41 82 123 205 246 410 615 1230 553759 1107518 1661277 2768795 3322554 5537590 8306385 16612770 22704119 45408238 68112357 113520595 136224714 227041190 340561785 681123570