255631432164 has 12 divisors (see below), whose sum is σ = 596473341744. Its totient is φ = 85210477384.

The previous prime is 255631432109. The next prime is 255631432183. The reversal of 255631432164 is 461234136552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×255631432164² (a number of 24 digits) contains 22 as substring.

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, 10651309662 + ... + 10651309685.

It is an arithmetic number, because the mean of its divisors is an integer number (49706111812).

Almost surely, 2^255631432164 is an apocalyptic number.

It is an amenable number.

255631432164 is an abundant number, since it is smaller than the sum of its proper divisors (340841909580).

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

255631432164 is a wasteful number, since it uses less digits than its factorization.

255631432164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21302619354 (or 21302619352 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 255631432164 in words is "two hundred fifty-five billion, six hundred thirty-one million, four hundred thirty-two thousand, one hundred sixty-four".