265640660364665 has 32 divisors (see below), whose sum is σ = 326466842999040. Its totient is φ = 207440007264000.

The previous prime is 265640660364649. The next prime is 265640660364679. The reversal of 265640660364665 is 566463066046562.

It is not a de Polignac number, because 265640660364665 - 2⁴ = 265640660364649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2476343651 + ... + 2476450919.

It is an arithmetic number, because the mean of its divisors is an integer number (10202088843720).

Almost surely, 2^{265640660364665} is an apocalyptic number.

It is an amenable number.

265640660364665 is a deficient number, since it is larger than the sum of its proper divisors (60826182634375).

265640660364665 is a wasteful number, since it uses less digits than its factorization.

265640660364665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176513.

The product of its (nonzero) digits is 671846400, while the sum is 65.

The spelling of 265640660364665 in words is "two hundred sixty-five trillion, six hundred forty billion, six hundred sixty million, three hundred sixty-four thousand, six hundred sixty-five".