12979724775 has 24 divisors (see below), whose sum is σ = 21762071424. Its totient is φ = 6825016800.

The previous prime is 12979724749. The next prime is 12979724819. The reversal of 12979724775 is 57742797921.

It is not a de Polignac number, because 12979724775 - 2²² = 12975530471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213429 + ... + 1224078.

It is an arithmetic number, because the mean of its divisors is an integer number (906752976).

Almost surely, 2^12979724775 is an apocalyptic number.

12979724775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12979724775 is a deficient number, since it is larger than the sum of its proper divisors (8782346649).

12979724775 is a wasteful number, since it uses less digits than its factorization.

12979724775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437591 (or 2437586 counting only the distinct ones).

The product of its digits is 15558480, while the sum is 60.

The spelling of 12979724775 in words is "twelve billion, nine hundred seventy-nine million, seven hundred twenty-four thousand, seven hundred seventy-five".