265640351365161 has 12 divisors (see below), whose sum is σ = 397913941962992. Its totient is φ = 177093567576612.

The previous prime is 265640351365021. The next prime is 265640351365171. The reversal of 265640351365161 is 161563153046562.

265640351365161 is a `hidden beast` number, since 2 + 6 + 5 + 6 + 4 + 0 + 3 + 513 + 65 + 1 + 61 = 666.

It is not a de Polignac number, because 265640351365161 - 2¹⁵ = 265640351332393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265640351365098 and 265640351365107.

It is not an unprimeable number, because it can be changed into a prime (265640351365171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546585084871 + ... + 546585085356.

Almost surely, 2^{265640351365161} is an apocalyptic number.

It is an amenable number.

265640351365161 is a deficient number, since it is larger than the sum of its proper divisors (132273590597831).

265640351365161 is an equidigital number, since it uses as much as digits as its factorization.

265640351365161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093170170242 (or 1093170170230 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 265640351365161 in words is "two hundred sixty-five trillion, six hundred forty billion, three hundred fifty-one million, three hundred sixty-five thousand, one hundred sixty-one".