256526563388 has 12 divisors (see below), whose sum is σ = 448983826032. Its totient is φ = 128245470240.

The previous prime is 256526563367. The next prime is 256526563441. The reversal of 256526563388 is 883365625652.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 4420433 + ... + 4478088.

It is an arithmetic number, because the mean of its divisors is an integer number (37415318836).

Almost surely, 2^256526563388 is an apocalyptic number.

It is an amenable number.

256526563388 is a deficient number, since it is larger than the sum of its proper divisors (192457262644).

256526563388 is a wasteful number, since it uses less digits than its factorization.

256526563388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905732 (or 8905730 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 59.

The spelling of 256526563388 in words is "two hundred fifty-six billion, five hundred twenty-six million, five hundred sixty-three thousand, three hundred eighty-eight".