12939431257635 has 32 divisors (see below), whose sum is σ = 21941085745152. Its totient is φ = 6489111682560.

The previous prime is 12939431257633. The next prime is 12939431257637. The reversal of 12939431257635 is 53675213493921.

It is an interprime number because it is at equal distance from previous prime (12939431257633) and next prime (12939431257637).

It is not a de Polignac number, because 12939431257635 - 2¹ = 12939431257633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12939431257633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23063601 + ... + 23617970.

It is an arithmetic number, because the mean of its divisors is an integer number (685658929536).

Almost surely, 2^{12939431257635} is an apocalyptic number.

12939431257635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12939431257635 is a deficient number, since it is larger than the sum of its proper divisors (9001654487517).

12939431257635 is a wasteful number, since it uses less digits than its factorization.

12939431257635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46682683.

The product of its digits is 36741600, while the sum is 60.

The spelling of 12939431257635 in words is "twelve trillion, nine hundred thirty-nine billion, four hundred thirty-one million, two hundred fifty-seven thousand, six hundred thirty-five".