638707010612 has 24 divisors (see below), whose sum is σ = 1220068422720. Its totient is φ = 290150255360.

The previous prime is 638707010609. The next prime is 638707010647. The reversal of 638707010612 is 216010707836.

638707010612 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 2×638707010612² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 638707010612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4202312 + ... + 4351647.

It is an arithmetic number, because the mean of its divisors is an integer number (50836184280).

Almost surely, 2^638707010612 is an apocalyptic number.

It is an amenable number.

638707010612 is a deficient number, since it is larger than the sum of its proper divisors (581361412108).

638707010612 is a wasteful number, since it uses less digits than its factorization.

638707010612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555671 (or 8555669 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 638707010612 in words is "six hundred thirty-eight billion, seven hundred seven million, ten thousand, six hundred twelve".