12317621517 has 12 divisors (see below), whose sum is σ = 18042714144. Its totient is φ = 8096088840.

The previous prime is 12317621497. The next prime is 12317621521. The reversal of 12317621517 is 71512671321.

12317621517 is a `hidden beast` number, since 1 + 2 + 3 + 17 + 621 + 5 + 17 = 666.

It is not a de Polignac number, because 12317621517 - 2¹⁰ = 12317620493 is a prime.

It is a super-2 number, since 2×12317621517² (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 (12317621527) 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, 9637563 + ... + 9638840.

It is an arithmetic number, because the mean of its divisors is an integer number (1503559512).

Almost surely, 2^12317621517 is an apocalyptic number.

It is an amenable number.

12317621517 is a deficient number, since it is larger than the sum of its proper divisors (5725092627).

12317621517 is a wasteful number, since it uses less digits than its factorization.

12317621517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19276480 (or 19276477 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The spelling of 12317621517 in words is "twelve billion, three hundred seventeen million, six hundred twenty-one thousand, five hundred seventeen".