638005000956 has 48 divisors (see below), whose sum is σ = 1514017438080. Its totient is φ = 209048973120.

The previous prime is 638005000949. The next prime is 638005000957. The reversal of 638005000956 is 659000500836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638005000957) 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, 14889795 + ... + 14932581.

It is an arithmetic number, because the mean of its divisors is an integer number (31542029960).

Almost surely, 2^638005000956 is an apocalyptic number.

It is an amenable number.

638005000956 is an abundant number, since it is smaller than the sum of its proper divisors (876012437124).

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

638005000956 is a wasteful number, since it uses less digits than its factorization.

638005000956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63914 (or 63912 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 638005000956 in words is "six hundred thirty-eight billion, five million, nine hundred fifty-six", and thus it is an aban number.