12515277975 has 24 divisors (see below), whose sum is σ = 20707080912. Its totient is φ = 6669926400.

The previous prime is 12515277967. The next prime is 12515278021. The reversal of 12515277975 is 57977251521.

It is a happy number.

It is not a de Polignac number, because 12515277975 - 2³ = 12515277967 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, 43159 + ... + 163991.

It is an arithmetic number, because the mean of its divisors is an integer number (862795038).

Almost surely, 2^12515277975 is an apocalyptic number.

12515277975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12515277975 is a deficient number, since it is larger than the sum of its proper divisors (8191802937).

12515277975 is a wasteful number, since it uses less digits than its factorization.

12515277975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122227 (or 122222 counting only the distinct ones).

The product of its digits is 1543500, while the sum is 51.

The spelling of 12515277975 in words is "twelve billion, five hundred fifteen million, two hundred seventy-seven thousand, nine hundred seventy-five".