12396562731 has 16 divisors (see below), whose sum is σ = 20988889600. Its totient is φ = 7083750024.

The previous prime is 12396562727. The next prime is 12396562753. The reversal of 12396562731 is 13726569321.

12396562731 is a `hidden beast` number, since 12 + 3 + 9 + 6 + 5 + 627 + 3 + 1 = 666.

It is not a de Polignac number, because 12396562731 - 2² = 12396562727 is a prime.

It is a super-2 number, since 2×12396562731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12396562721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32794951 + ... + 32795328.

It is an arithmetic number, because the mean of its divisors is an integer number (1311805600).

Almost surely, 2^12396562731 is an apocalyptic number.

12396562731 is a deficient number, since it is larger than the sum of its proper divisors (8592326869).

12396562731 is an equidigital number, since it uses as much as digits as its factorization.

12396562731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65590295 (or 65590289 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 12396562731 in words is "twelve billion, three hundred ninety-six million, five hundred sixty-two thousand, seven hundred thirty-one".