12515976740 has 12 divisors (see below), whose sum is σ = 26283551196. Its totient is φ = 5006390688.

The previous prime is 12515976731. The next prime is 12515976749. The reversal of 12515976740 is 4767951521.

It is an interprime number because it is at equal distance from previous prime (12515976731) and next prime (12515976749).

It can be written as a sum of positive squares in 2 ways, for example, as 2113608676 + 10402368064 = 45974^2 + 101992^2 .

It is not an unprimeable number, because it can be changed into a prime (12515976749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312899399 + ... + 312899438.

It is an arithmetic number, because the mean of its divisors is an integer number (2190295933).

Almost surely, 2^12515976740 is an apocalyptic number.

12515976740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12515976740 is an abundant number, since it is smaller than the sum of its proper divisors (13767574456).

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

12515976740 is a wasteful number, since it uses less digits than its factorization.

12515976740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625798846 (or 625798844 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 12515976740 in words is "twelve billion, five hundred fifteen million, nine hundred seventy-six thousand, seven hundred forty".