265556241665 has 64 divisors (see below), whose sum is σ = 381968842752. Its totient is φ = 174689222400.

The previous prime is 265556241641. The next prime is 265556241697. The reversal of 265556241665 is 566142655562.

It is not a de Polignac number, because 265556241665 - 2¹⁴ = 265556225281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9135344 + ... + 9164366.

It is an arithmetic number, because the mean of its divisors is an integer number (5968263168).

Almost surely, 2^265556241665 is an apocalyptic number.

It is an amenable number.

265556241665 is a deficient number, since it is larger than the sum of its proper divisors (116412601087).

265556241665 is a wasteful number, since it uses less digits than its factorization.

265556241665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29310.

The product of its digits is 12960000, while the sum is 53.

The spelling of 265556241665 in words is "two hundred sixty-five billion, five hundred fifty-six million, two hundred forty-one thousand, six hundred sixty-five".