265081008645 has 80 divisors (see below), whose sum is σ = 497234525040. Its totient is φ = 134959758336.

The previous prime is 265081008641. The next prime is 265081008659. The reversal of 265081008645 is 546800180562.

265081008645 is a `hidden beast` number, since 26 + 508 + 1 + 0 + 0 + 86 + 45 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3378166884 + 261702841761 = 58122^2 + 511569^2 .

It is not a de Polignac number, because 265081008645 - 2² = 265081008641 is a prime.

It is a super-2 number, since 2×265081008645² (a number of 24 digits) contains 22 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 265081008645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265081008641) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 627321 + ... + 961089.

It is an arithmetic number, because the mean of its divisors is an integer number (6215431563).

Almost surely, 2^265081008645 is an apocalyptic number.

It is an amenable number.

265081008645 is a deficient number, since it is larger than the sum of its proper divisors (232153516395).

265081008645 is a wasteful number, since it uses less digits than its factorization.

265081008645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333876 (or 333867 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 265081008645 in words is "two hundred sixty-five billion, eighty-one million, eight thousand, six hundred forty-five".