12389679520 has 48 divisors (see below), whose sum is σ = 29277286920. Its totient is φ = 4954742784.

The previous prime is 12389679499. The next prime is 12389679563. The reversal of 12389679520 is 2597698321.

It can be written as a sum of positive squares in 4 ways, for example, as 8171436816 + 4218242704 = 90396^2 + 64948^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308724 + ... + 1318156.

Almost surely, 2^12389679520 is an apocalyptic number.

12389679520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12389679520 is an abundant number, since it is smaller than the sum of its proper divisors (16887607400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12389679520 is an equidigital number, since it uses as much as digits as its factorization.

12389679520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17657 (or 17649 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 12389679520 in words is "twelve billion, three hundred eighty-nine million, six hundred seventy-nine thousand, five hundred twenty".