638005000980 has 48 divisors (see below), whose sum is σ = 1891497182400. Its totient is φ = 160126745088.

The previous prime is 638005000957. The next prime is 638005000991. The reversal of 638005000980 is 89000500836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312746530 + ... + 312748569.

It is an arithmetic number, because the mean of its divisors is an integer number (39406191300).

Almost surely, 2^638005000980 is an apocalyptic number.

638005000980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638005000980 is an abundant number, since it is smaller than the sum of its proper divisors (1253492181420).

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

638005000980 is a wasteful number, since it uses less digits than its factorization.

638005000980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625495128 (or 625495126 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 638005000980 in words is "six hundred thirty-eight billion, five million, nine hundred eighty", and thus it is an aban number.