12515442039 has 12 divisors (see below), whose sum is σ = 18188769976. Its totient is φ = 8292439152.

The previous prime is 12515441969. The next prime is 12515442059. The reversal of 12515442039 is 93024451521.

12515442039 is a `hidden beast` number, since 12 + 51 + 544 + 20 + 39 = 666.

It is not a de Polignac number, because 12515442039 - 2⁹ = 12515441527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12515441994 and 12515442012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515442059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4264192 + ... + 4267125.

Almost surely, 2^12515442039 is an apocalyptic number.

12515442039 is a deficient number, since it is larger than the sum of its proper divisors (5673327937).

12515442039 is a wasteful number, since it uses less digits than its factorization.

12515442039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531486 (or 8531483 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 12515442039 in words is "twelve billion, five hundred fifteen million, four hundred forty-two thousand, thirty-nine".