252640025020 has 12 divisors (see below), whose sum is σ = 530544052584. Its totient is φ = 101056010000.

The previous prime is 252640024927. The next prime is 252640025021. The reversal of 252640025020 is 20520046252.

It is a self number, because there is not a number n which added to its sum of digits gives 252640025020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252640025021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6316000606 + ... + 6316000645.

It is an arithmetic number, because the mean of its divisors is an integer number (44212004382).

Almost surely, 2^252640025020 is an apocalyptic number.

252640025020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252640025020 is an abundant number, since it is smaller than the sum of its proper divisors (277904027564).

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

252640025020 is a wasteful number, since it uses less digits than its factorization.

252640025020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12632001260 (or 12632001258 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 252640025020 in words is "two hundred fifty-two billion, six hundred forty million, twenty-five thousand, twenty".