225261313665 has 32 divisors (see below), whose sum is σ = 362333575296. Its totient is φ = 119501168640.

The previous prime is 225261313633. The next prime is 225261313741. The reversal of 225261313665 is 566313162522.

It is a happy number.

It is not a de Polignac number, because 225261313665 - 2⁵ = 225261313633 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, 19766209 + ... + 19777601.

It is an arithmetic number, because the mean of its divisors is an integer number (11322924228).

Almost surely, 2^225261313665 is an apocalyptic number.

It is an amenable number.

225261313665 is a deficient number, since it is larger than the sum of its proper divisors (137072261631).

225261313665 is a wasteful number, since it uses less digits than its factorization.

225261313665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18289.

The product of its digits is 388800, while the sum is 42.

The spelling of 225261313665 in words is "two hundred twenty-five billion, two hundred sixty-one million, three hundred thirteen thousand, six hundred sixty-five".