12515195151939 has 32 divisors (see below), whose sum is σ = 17574829977600. Its totient is φ = 7899995543040.

The previous prime is 12515195151937. The next prime is 12515195151961. The reversal of 12515195151939 is 93915159151521.

It is not a de Polignac number, because 12515195151939 - 2¹ = 12515195151937 is a prime.

It is a super-2 number, since 2×12515195151939² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (12515195151937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1057109982 + ... + 1057121820.

It is an arithmetic number, because the mean of its divisors is an integer number (549213436800).

Almost surely, 2^{12515195151939} is an apocalyptic number.

12515195151939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12515195151939 is a deficient number, since it is larger than the sum of its proper divisors (5059634825661).

12515195151939 is a wasteful number, since it uses less digits than its factorization.

12515195151939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20475.

The product of its digits is 2733750, while the sum is 57.

The spelling of 12515195151939 in words is "twelve trillion, five hundred fifteen billion, one hundred ninety-five million, one hundred fifty-one thousand, nine hundred thirty-nine".