12638722176 has 96 divisors (see below), whose sum is σ = 38283476400. Its totient is φ = 3991168512.

The previous prime is 12638722171. The next prime is 12638722183. The reversal of 12638722176 is 67122783621.

12638722176 is a `hidden beast` number, since 1 + 2 + 638 + 7 + 2 + 2 + 1 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×12638722176² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12638722171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266826 + ... + 310601.

Almost surely, 2^12638722176 is an apocalyptic number.

12638722176 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12638722176 is an abundant number, since it is smaller than the sum of its proper divisors (25644754224).

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

12638722176 is a wasteful number, since it uses less digits than its factorization.

12638722176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577466 (or 577451 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 12638722176 in words is "twelve billion, six hundred thirty-eight million, seven hundred twenty-two thousand, one hundred seventy-six".