638416973116 has 12 divisors (see below), whose sum is σ = 1203170449432. Its totient is φ = 294653987568.

The previous prime is 638416973111. The next prime is 638416973141. The reversal of 638416973116 is 611379614836.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638416973111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6138624690 + ... + 6138624793.

Almost surely, 2^638416973116 is an apocalyptic number.

It is an amenable number.

638416973116 is a deficient number, since it is larger than the sum of its proper divisors (564753476316).

638416973116 is a wasteful number, since it uses less digits than its factorization.

638416973116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12277249500 (or 12277249498 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 55.

The spelling of 638416973116 in words is "six hundred thirty-eight billion, four hundred sixteen million, nine hundred seventy-three thousand, one hundred sixteen".