12439855972324 has 27 divisors (see below), whose sum is σ = 23928880477411. Its totient is φ = 5654444717240.

The previous prime is 12439855972279. The next prime is 12439855972331. The reversal of 12439855972324 is 42327955893421.

The square root of 12439855972324 is 3527018.

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

It is a super-2 number, since 2×12439855972324² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 77514237 + ... + 77674555.

Almost surely, 2^{12439855972324} is an apocalyptic number.

12439855972324 is the 3527018-th square number.

It is an amenable number.

12439855972324 is a deficient number, since it is larger than the sum of its proper divisors (11489024505087).

12439855972324 is an frugal number, since it uses more digits than its factorization.

12439855972324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320664 (or 160332 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 64.

Multiplying 12439855972324 by its sum of digits (64), we get a square (796150782228736 = 28216144²).

The spelling of 12439855972324 in words is "twelve trillion, four hundred thirty-nine billion, eight hundred fifty-five million, nine hundred seventy-two thousand, three hundred twenty-four".