638005000977 has 16 divisors (see below), whose sum is σ = 947006804160. Its totient is φ = 424520272800.

The previous prime is 638005000957. The next prime is 638005000991. The reversal of 638005000977 is 779000500836.

It is a happy number.

638005000977 is a `hidden beast` number, since 63 + 80 + 0 + 500 + 0 + 9 + 7 + 7 = 666.

It is not a de Polignac number, because 638005000977 - 2²⁰ = 638003952401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638005000907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22663299 + ... + 22691432.

It is an arithmetic number, because the mean of its divisors is an integer number (59187925260).

Almost surely, 2^638005000977 is an apocalyptic number.

It is an amenable number.

638005000977 is a deficient number, since it is larger than the sum of its proper divisors (309001803183).

638005000977 is a wasteful number, since it uses less digits than its factorization.

638005000977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355261 (or 45355255 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 638005000977 in words is "six hundred thirty-eight billion, five million, nine hundred seventy-seven", and thus it is an aban number.