256747747652 has 36 divisors (see below), whose sum is σ = 494046888048. Its totient is φ = 116661270000.

The previous prime is 256747747649. The next prime is 256747747691.

256747747652 is nontrivially palindromic in base 10.

Its product of digits (138297600) is a multiple of the sum of its prime factors (192080).

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, 1262027 + ... + 1451277.

It is an arithmetic number, because the mean of its divisors is an integer number (13723524668).

Almost surely, 2^256747747652 is an apocalyptic number.

256747747652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256747747652 is a deficient number, since it is larger than the sum of its proper divisors (237299140396).

256747747652 is a wasteful number, since it uses less digits than its factorization.

256747747652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192080 (or 192067 counting only the distinct ones).

The product of its digits is 138297600, while the sum is 62.

The spelling of 256747747652 in words is "two hundred fifty-six billion, seven hundred forty-seven million, seven hundred forty-seven thousand, six hundred fifty-two".