265164320655 has 256 divisors, whose sum is σ = 553551667200. Its totient is φ = 119233658880.

The previous prime is 265164320623. The next prime is 265164320669. The reversal of 265164320655 is 556023461562.

265164320655 is a `hidden beast` number, since 26 + 516 + 43 + 20 + 6 + 55 = 666.

It is not a de Polignac number, because 265164320655 - 2⁵ = 265164320623 is a prime.

It is a super-3 number, since 3×265164320655³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 265164320655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 292352712 + ... + 292353618.

It is an arithmetic number, because the mean of its divisors is an integer number (2162311200).

Almost surely, 2^265164320655 is an apocalyptic number.

265164320655 is an abundant number, since it is smaller than the sum of its proper divisors (288387346545).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265164320655 is a wasteful number, since it uses less digits than its factorization.

265164320655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 265164320655 in words is "two hundred sixty-five billion, one hundred sixty-four million, three hundred twenty thousand, six hundred fifty-five".