252172291631778 has 96 divisors (see below), whose sum is σ = 682485269806080. Its totient is φ = 65623583600640.

The previous prime is 252172291631749. The next prime is 252172291631797. The reversal of 252172291631778 is 877136192271252.

252172291631778 is a `hidden beast` number, since 2 + 5 + 2 + 17 + 229 + 16 + 317 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1898764143 + ... + 1898896946.

It is an arithmetic number, because the mean of its divisors is an integer number (7109221560480).

Almost surely, 2^{252172291631778} is an apocalyptic number.

252172291631778 is an abundant number, since it is smaller than the sum of its proper divisors (430312978174302).

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

252172291631778 is a wasteful number, since it uses less digits than its factorization.

252172291631778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797661152 (or 3797661149 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 252172291631778 in words is "two hundred fifty-two trillion, one hundred seventy-two billion, two hundred ninety-one million, six hundred thirty-one thousand, seven hundred seventy-eight".