256990505099652 has 36 divisors (see below), whose sum is σ = 677859013453440. Its totient is φ = 81939001625712.

The previous prime is 256990505099579. The next prime is 256990505099687.

256990505099652 is a `hidden beast` number, since 2 + 5 + 6 + 9 + 9 + 0 + 50 + 509 + 9 + 65 + 2 = 666.

256990505099652 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×256990505099652² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155187502252 + ... + 155187503907.

Almost surely, 2^{256990505099652} is an apocalyptic number.

It is an amenable number.

256990505099652 is an abundant number, since it is smaller than the sum of its proper divisors (420868508353788).

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

256990505099652 is a wasteful number, since it uses less digits than its factorization.

256990505099652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310375006192 (or 310375006187 counting only the distinct ones).

The product of its (nonzero) digits is 590490000, while the sum is 72.

The spelling of 256990505099652 in words is "two hundred fifty-six trillion, nine hundred ninety billion, five hundred five million, ninety-nine thousand, six hundred fifty-two".