256431363772 has 12 divisors (see below), whose sum is σ = 448765399656. Its totient is φ = 128212678160.

The previous prime is 256431363709. The next prime is 256431363833. The reversal of 256431363772 is 277363134652.

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, 553054 + ... + 904837.

It is an arithmetic number, because the mean of its divisors is an integer number (37397116638).

Almost surely, 2^256431363772 is an apocalyptic number.

It is an amenable number.

256431363772 is a deficient number, since it is larger than the sum of its proper divisors (192334035884).

256431363772 is a wasteful number, since it uses less digits than its factorization.

256431363772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501868 (or 1501866 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 49.

The spelling of 256431363772 in words is "two hundred fifty-six billion, four hundred thirty-one million, three hundred sixty-three thousand, seven hundred seventy-two".