256621113234532 has 12 divisors (see below), whose sum is σ = 453533353588476. Its totient is φ = 127040155066400.

The previous prime is 256621113234461. The next prime is 256621113234581. The reversal of 256621113234532 is 235432311126652.

It can be written as a sum of positive squares in 2 ways, for example, as 253568489259556 + 3052623974976 = 15923834^2 + 1747176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317600387263 + ... + 317600388070.

It is an arithmetic number, because the mean of its divisors is an integer number (37794446132373).

Almost surely, 2^{256621113234532} is an apocalyptic number.

It is an amenable number.

256621113234532 is a deficient number, since it is larger than the sum of its proper divisors (196912240353944).

256621113234532 is a wasteful number, since it uses less digits than its factorization.

256621113234532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635200775438 (or 635200775436 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 46.

The spelling of 256621113234532 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, one hundred thirteen million, two hundred thirty-four thousand, five hundred thirty-two".