256631075065602 has 24 divisors (see below), whose sum is σ = 556901443732140. Its totient is φ = 85410238187520.

The previous prime is 256631075065583. The next prime is 256631075065609. The reversal of 256631075065602 is 206560570136652.

256631075065602 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 3 + 1 + 0 + 75 + 0 + 6 + 560 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 251630041848201 + 5001033217401 = 15862851^2 + 2236299^2 .

It is not an unprimeable number, because it can be changed into a prime (256631075065609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11121113227 + ... + 11121136302.

Almost surely, 2^{256631075065602} is an apocalyptic number.

256631075065602 is an abundant number, since it is smaller than the sum of its proper divisors (300270368666538).

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

256631075065602 is a wasteful number, since it uses less digits than its factorization.

256631075065602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22242250178 (or 22242250175 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 256631075065602 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, seventy-five million, sixty-five thousand, six hundred two".