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68805975410 = 2561112796681
BaseRepresentation
bin100000000010100100…
…1111101110101110010
320120121012120201001122
41000011021331311302
52111403312203120
651335314502242
74654035066254
oct1000511756562
9216535521048
1068805975410
11271a91a7797
1211402b94982
136646c65c23
14348a1ddcd4
151bca8a5a25
hex100527dd72

68805975410 has 16 divisors (see below), whose sum is σ = 125881097112. Its totient is φ = 27071203200.

The previous prime is 68805975401. The next prime is 68805975421. The reversal of 68805975410 is 1457950886.

It can be written as a sum of positive squares in 4 ways, for example, as 31844759401 + 36961216009 = 178451^2 + 192253^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56397731 + ... + 56398950.

Almost surely, 268805975410 is an apocalyptic number.

68805975410 is a deficient number, since it is larger than the sum of its proper divisors (57075121702).

68805975410 is a wasteful number, since it uses less digits than its factorization.

68805975410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112796749.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 68805975410 in words is "sixty-eight billion, eight hundred five million, nine hundred seventy-five thousand, four hundred ten".

Divisors: 1 2 5 10 61 122 305 610 112796681 225593362 563983405 1127966810 6880597541 13761195082 34402987705 68805975410