265815815979 has 24 divisors (see below), whose sum is σ = 412767031248. Its totient is φ = 151717440000.

The previous prime is 265815815963. The next prime is 265815815981. The reversal of 265815815979 is 979518518562.

It is not a de Polignac number, because 265815815979 - 2⁴ = 265815815963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (265815815179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 929022 + ... + 1180979.

It is an arithmetic number, because the mean of its divisors is an integer number (17198626302).

Almost surely, 2^265815815979 is an apocalyptic number.

265815815979 is a deficient number, since it is larger than the sum of its proper divisors (146951215269).

265815815979 is a wasteful number, since it uses less digits than its factorization.

265815815979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110875 (or 2110868 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 66.

The spelling of 265815815979 in words is "two hundred sixty-five billion, eight hundred fifteen million, eight hundred fifteen thousand, nine hundred seventy-nine".