12765379525865 has 16 divisors (see below), whose sum is σ = 15338742052608. Its totient is φ = 10198787531136.

The previous prime is 12765379525841. The next prime is 12765379525901. The reversal of 12765379525865 is 56852597356721.

It is a cyclic number.

It is not a de Polignac number, because 12765379525865 - 2²⁶ = 12765312417001 is a prime.

It is a Duffinian 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, 11787122 + ... + 12824468.

It is an arithmetic number, because the mean of its divisors is an integer number (958671378288).

Almost surely, 2^{12765379525865} is an apocalyptic number.

It is an amenable number.

12765379525865 is a deficient number, since it is larger than the sum of its proper divisors (2573362526743).

12765379525865 is a wasteful number, since it uses less digits than its factorization.

12765379525865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040608.

The product of its digits is 952560000, while the sum is 71.

The spelling of 12765379525865 in words is "twelve trillion, seven hundred sixty-five billion, three hundred seventy-nine million, five hundred twenty-five thousand, eight hundred sixty-five".