12637013157 has 6 divisors (see below), whose sum is σ = 18253463462. Its totient is φ = 8424675432.

The previous prime is 12637013141. The next prime is 12637013159. The reversal of 12637013157 is 75131073621.

12637013157 is a `hidden beast` number, since 1 + 2 + 637 + 0 + 1 + 3 + 15 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11743840161 + 893172996 = 108369^2 + 29886^2 .

It is not a de Polignac number, because 12637013157 - 2⁴ = 12637013141 is a prime.

It is a super-2 number, since 2×12637013157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12637013159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702056278 + ... + 702056295.

Almost surely, 2^12637013157 is an apocalyptic number.

It is an amenable number.

12637013157 is a deficient number, since it is larger than the sum of its proper divisors (5616450305).

12637013157 is a wasteful number, since it uses less digits than its factorization.

12637013157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404112579 (or 1404112576 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

Adding to 12637013157 its reverse (75131073621), we get a palindrome (87768086778).

The spelling of 12637013157 in words is "twelve billion, six hundred thirty-seven million, thirteen thousand, one hundred fifty-seven".