625687864 has 16 divisors (see below), whose sum is σ = 1187300520. Its totient is φ = 309074400.

The previous prime is 625687801. The next prime is 625687897. The reversal of 625687864 is 468786526.

625687864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470487 + ... + 471814.

Almost surely, 2^625687864 is an apocalyptic number.

It is an amenable number.

625687864 is a deficient number, since it is larger than the sum of its proper divisors (561612656).

625687864 is a wasteful number, since it uses less digits than its factorization.

625687864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942390 (or 942386 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 52.

The square root of 625687864 is about 25013.7534968265. The cubic root of 625687864 is about 855.3015199104.

The spelling of 625687864 in words is "six hundred twenty-five million, six hundred eighty-seven thousand, eight hundred sixty-four".