12765449615 has 16 divisors (see below), whose sum is σ = 15596292096. Its totient is φ = 10028340000.

The previous prime is 12765449591. The next prime is 12765449657. The reversal of 12765449615 is 51694456721.

It is not a de Polignac number, because 12765449615 - 2²⁴ = 12748672399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17474 + ... + 160736.

It is an arithmetic number, because the mean of its divisors is an integer number (974768256).

Almost surely, 2^12765449615 is an apocalyptic number.

12765449615 is a deficient number, since it is larger than the sum of its proper divisors (2830842481).

12765449615 is a wasteful number, since it uses less digits than its factorization.

12765449615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143590.

The product of its digits is 1814400, while the sum is 50.

The spelling of 12765449615 in words is "twelve billion, seven hundred sixty-five million, four hundred forty-nine thousand, six hundred fifteen".