255421631904 has 48 divisors (see below), whose sum is σ = 675761200128. Its totient is φ = 84470141952.

The previous prime is 255421631851. The next prime is 255421631947. The reversal of 255421631904 is 409136124552.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10462777 + ... + 10487160.

It is an arithmetic number, because the mean of its divisors is an integer number (14078358336).

Almost surely, 2^255421631904 is an apocalyptic number.

255421631904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

255421631904 is an abundant number, since it is smaller than the sum of its proper divisors (420339568224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255421631904 is a wasteful number, since it uses less digits than its factorization.

255421631904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20950077 (or 20950069 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 255421631904 in words is "two hundred fifty-five billion, four hundred twenty-one million, six hundred thirty-one thousand, nine hundred four".