265916039256815 has 16 divisors (see below), whose sum is σ = 326648560094208. Its totient is φ = 207703846998816.

The previous prime is 265916039256731. The next prime is 265916039256887. The reversal of 265916039256815 is 518652930619562.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265916039256815 is a prime.

It is a super-2 number, since 2×265916039256815² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

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, 242634299 + ... + 243727788.

It is an arithmetic number, because the mean of its divisors is an integer number (20415535005888).

Almost surely, 2^{265916039256815} is an apocalyptic number.

265916039256815 is a deficient number, since it is larger than the sum of its proper divisors (60732520837393).

265916039256815 is a wasteful number, since it uses less digits than its factorization.

265916039256815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486364678.

The product of its (nonzero) digits is 209952000, while the sum is 68.

The spelling of 265916039256815 in words is "two hundred sixty-five trillion, nine hundred sixteen billion, thirty-nine million, two hundred fifty-six thousand, eight hundred fifteen".