12315895815 has 16 divisors (see below), whose sum is σ = 19708073568. Its totient is φ = 6567597696.

The previous prime is 12315895807. The next prime is 12315895843. The reversal of 12315895815 is 51859851321.

It is not a de Polignac number, because 12315895815 - 2³ = 12315895807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69817 + ... + 171773.

It is an arithmetic number, because the mean of its divisors is an integer number (1231754598).

Almost surely, 2^12315895815 is an apocalyptic number.

12315895815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12315895815 is a deficient number, since it is larger than the sum of its proper divisors (7392177753).

12315895815 is a wasteful number, since it uses less digits than its factorization.

12315895815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110018.

The product of its digits is 432000, while the sum is 48.

The spelling of 12315895815 in words is "twelve billion, three hundred fifteen million, eight hundred ninety-five thousand, eight hundred fifteen".