252640696564 has 12 divisors (see below), whose sum is σ = 442125848164. Its totient is φ = 126319025664.

The previous prime is 252640696547. The next prime is 252640696571. The reversal of 252640696564 is 465696046252.

It can be written as a sum of positive squares in 2 ways, for example, as 66379400164 + 186261296400 = 257642^2 + 431580^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 190342 + ... + 735874.

Almost surely, 2^252640696564 is an apocalyptic number.

It is an amenable number.

252640696564 is a deficient number, since it is larger than the sum of its proper divisors (189485151600).

252640696564 is a wasteful number, since it uses less digits than its factorization.

252640696564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661314 (or 661312 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 252640696564 in words is "two hundred fifty-two billion, six hundred forty million, six hundred ninety-six thousand, five hundred sixty-four".