12389639691664 has 15 divisors (see below), whose sum is σ = 24004954181793. Its totient is φ = 6194812806048.

The previous prime is 12389639691643. The next prime is 12389639691673. The reversal of 12389639691664 is 46619693698321.

The square root of 12389639691664 is 3519892.

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., 10380639610000 + 2009000081664 = 3221900^2 + 1417392^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13639582 + ... + 14519554.

Almost surely, 2^{12389639691664} is an apocalyptic number.

12389639691664 is the 3519892-nd square number.

It is an amenable number.

12389639691664 is a deficient number, since it is larger than the sum of its proper divisors (11615314490129).

12389639691664 is an frugal number, since it uses more digits than its factorization.

12389639691664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759954 (or 879975 counting only the distinct ones).

The product of its digits is 544195584, while the sum is 73.

The spelling of 12389639691664 in words is "twelve trillion, three hundred eighty-nine billion, six hundred thirty-nine million, six hundred ninety-one thousand, six hundred sixty-four".