638276672836 has 48 divisors (see below), whose sum is σ = 1220381854272. Its totient is φ = 289684771200.

The previous prime is 638276672833. The next prime is 638276672837.

638276672836 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×638276672836² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (638276672833) 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, 119368315 + ... + 119373661.

It is an arithmetic number, because the mean of its divisors is an integer number (25424621964).

Almost surely, 2^638276672836 is an apocalyptic number.

It is an amenable number.

638276672836 is a deficient number, since it is larger than the sum of its proper divisors (582105181436).

638276672836 is a wasteful number, since it uses less digits than its factorization.

638276672836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980 (or 8978 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 64.

The spelling of 638276672836 in words is "six hundred thirty-eight billion, two hundred seventy-six million, six hundred seventy-two thousand, eight hundred thirty-six".