12978499713 has 4 divisors (see below), whose sum is σ = 17304666288. Its totient is φ = 8652333140.

The previous prime is 12978499637. The next prime is 12978499733. The reversal of 12978499713 is 31799487921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12978499713 - 2¹² = 12978495617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12978499733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2163083283 + ... + 2163083288.

It is an arithmetic number, because the mean of its divisors is an integer number (4326166572).

Almost surely, 2^12978499713 is an apocalyptic number.

It is an amenable number.

12978499713 is a deficient number, since it is larger than the sum of its proper divisors (4326166575).

12978499713 is an equidigital number, since it uses as much as digits as its factorization.

12978499713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326166574.

The product of its digits is 6858432, while the sum is 60.

The spelling of 12978499713 in words is "twelve billion, nine hundred seventy-eight million, four hundred ninety-nine thousand, seven hundred thirteen".