256632443152 has 20 divisors (see below), whose sum is σ = 505376595916. Its totient is φ = 126212676480.

The previous prime is 256632443147. The next prime is 256632443159. The reversal of 256632443152 is 251344236652.

It can be written as a sum of positive squares in 2 ways, for example, as 35954227456 + 220678215696 = 189616^2 + 469764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256632443099 and 256632443108.

It is not an unprimeable number, because it can be changed into a prime (256632443159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131470563 + ... + 131472514.

Almost surely, 2^256632443152 is an apocalyptic number.

It is an amenable number.

256632443152 is a deficient number, since it is larger than the sum of its proper divisors (248744152764).

256632443152 is a wasteful number, since it uses less digits than its factorization.

256632443152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262943146 (or 262943140 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 43.

The spelling of 256632443152 in words is "two hundred fifty-six billion, six hundred thirty-two million, four hundred forty-three thousand, one hundred fifty-two".