12697512732 has 36 divisors (see below), whose sum is σ = 32107195120. Its totient is φ = 4231092672.

The previous prime is 12697512731. The next prime is 12697512757. The reversal of 12697512732 is 23721579621.

It is a happy number.

12697512732 is a `hidden beast` number, since 1 + 2 + 69 + 7 + 512 + 73 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12697512732² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697512731) 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, 53568 + ... + 168120.

Almost surely, 2^12697512732 is an apocalyptic number.

12697512732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12697512732 is an abundant number, since it is smaller than the sum of its proper divisors (19409682388).

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

12697512732 is a wasteful number, since it uses less digits than its factorization.

12697512732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117642 (or 117637 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The spelling of 12697512732 in words is "twelve billion, six hundred ninety-seven million, five hundred twelve thousand, seven hundred thirty-two".