625637564 has 6 divisors (see below), whose sum is σ = 1094865744. Its totient is φ = 312818780.

The previous prime is 625637563. The next prime is 625637569. The reversal of 625637564 is 465736526.

It is a happy number.

625637564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×625637564² = 782844722975708192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625637563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78204692 + ... + 78204699.

It is an arithmetic number, because the mean of its divisors is an integer number (182477624).

Almost surely, 2^625637564 is an apocalyptic number.

It is an amenable number.

625637564 is a deficient number, since it is larger than the sum of its proper divisors (469228180).

625637564 is a wasteful number, since it uses less digits than its factorization.

625637564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156409395 (or 156409393 counting only the distinct ones).

The product of its digits is 907200, while the sum is 44.

The square root of 625637564 is about 25012.7480297547. The cubic root of 625637564 is about 855.2785996324.

The spelling of 625637564 in words is "six hundred twenty-five million, six hundred thirty-seven thousand, five hundred sixty-four".