625138064 has 20 divisors (see below), whose sum is σ = 1250277120. Its totient is φ = 302485920.

The previous prime is 625138049. The next prime is 625138067. The reversal of 625138064 is 460831526.

625138064 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (625138067) 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, 629684 + ... + 630675.

It is an arithmetic number, because the mean of its divisors is an integer number (62513856).

Almost surely, 2^625138064 is an apocalyptic number.

It is an amenable number.

625138064 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

625138064 is a wasteful number, since it uses less digits than its factorization.

625138064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260398 (or 1260392 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 625138064 is about 25002.7611275235. The cubic root of 625138064 is about 855.0509250016.

The spelling of 625138064 in words is "six hundred twenty-five million, one hundred thirty-eight thousand, sixty-four".