252909278538 has 16 divisors (see below), whose sum is σ = 578078351040. Its totient is φ = 72259793856.

The previous prime is 252909278537. The next prime is 252909278539. The reversal of 252909278538 is 835872909252.

It is an interprime number because it is at equal distance from previous prime (252909278537) and next prime (252909278539).

It is a super-2 number, since 2×252909278538² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252909278537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010824703 + ... + 3010824786.

It is an arithmetic number, because the mean of its divisors is an integer number (36129896940).

Almost surely, 2^252909278538 is an apocalyptic number.

252909278538 is an abundant number, since it is smaller than the sum of its proper divisors (325169072502).

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

252909278538 is a wasteful number, since it uses less digits than its factorization.

252909278538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021649501.

The product of its (nonzero) digits is 21772800, while the sum is 60.

The spelling of 252909278538 in words is "two hundred fifty-two billion, nine hundred nine million, two hundred seventy-eight thousand, five hundred thirty-eight".