252864520840 has 32 divisors (see below), whose sum is σ = 570364023960. Its totient is φ = 100893568000.

The previous prime is 252864520807. The next prime is 252864520859. The reversal of 252864520840 is 48025468252.

It can be written as a sum of positive squares in 4 ways, for example, as 236598579396 + 16265941444 = 486414^2 + 127538^2 .

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, 7866271 + ... + 7898350.

Almost surely, 2^252864520840 is an apocalyptic number.

252864520840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252864520840 is an abundant number, since it is smaller than the sum of its proper divisors (317499503120).

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

252864520840 is a wasteful number, since it uses less digits than its factorization.

252864520840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15765033 (or 15765029 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 46.

The spelling of 252864520840 in words is "two hundred fifty-two billion, eight hundred sixty-four million, five hundred twenty thousand, eight hundred forty".