265515663165 has 16 divisors (see below), whose sum is σ = 425742620928. Its totient is φ = 141302500416.

The previous prime is 265515663139. The next prime is 265515663197. The reversal of 265515663165 is 561366515562.

It is not a de Polignac number, because 265515663165 - 2⁹ = 265515662653 is a prime.

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, 19108654 + ... + 19122543.

It is an arithmetic number, because the mean of its divisors is an integer number (26608913808).

Almost surely, 2^265515663165 is an apocalyptic number.

It is an amenable number.

265515663165 is a deficient number, since it is larger than the sum of its proper divisors (160226957763).

265515663165 is a wasteful number, since it uses less digits than its factorization.

265515663165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38231668.

The product of its digits is 4860000, while the sum is 51.

The spelling of 265515663165 in words is "two hundred sixty-five billion, five hundred fifteen million, six hundred sixty-three thousand, one hundred sixty-five".