12637806724 has 9 divisors (see below), whose sum is σ = 22116555237. Its totient is φ = 6318790944.

The previous prime is 12637806721. The next prime is 12637806733. The reversal of 12637806724 is 42760873621.

The square root of 12637806724 is 112418.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9123688324 + 3514118400 = 95518^2 + 59280^2 .

It is a super-2 number, since 2×12637806724² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12637806721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 196732 + ... + 252940.

Almost surely, 2^12637806724 is an apocalyptic number.

12637806724 is the 112418-th square number.

It is an amenable number.

12637806724 is a deficient number, since it is larger than the sum of its proper divisors (9478748513).

12637806724 is an frugal number, since it uses more digits than its factorization.

12637806724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112422 (or 56211 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 12637806724 in words is "twelve billion, six hundred thirty-seven million, eight hundred six thousand, seven hundred twenty-four".