625439054868 has 24 divisors (see below), whose sum is σ = 1464514543968. Its totient is φ = 207743006496.

The previous prime is 625439054833. The next prime is 625439054899. The reversal of 625439054868 is 868450934526.

It is a happy number.

It is a super-2 number, since 2×625439054868² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92081271 + ... + 92088062.

It is an arithmetic number, because the mean of its divisors is an integer number (61021439332).

Almost surely, 2^625439054868 is an apocalyptic number.

It is an amenable number.

625439054868 is an abundant number, since it is smaller than the sum of its proper divisors (839075489100).

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

625439054868 is a wasteful number, since it uses less digits than its factorization.

625439054868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184169623 (or 184169621 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 60.

The spelling of 625439054868 in words is "six hundred twenty-five billion, four hundred thirty-nine million, fifty-four thousand, eight hundred sixty-eight".