265553320664 has 16 divisors (see below), whose sum is σ = 503506999800. Its totient is φ = 131284787392.

The previous prime is 265553320651. The next prime is 265553320667. The reversal of 265553320664 is 466023355562.

It is a super-2 number, since 2×265553320664² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265553320667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186483362 + ... + 186484785.

Almost surely, 2^265553320664 is an apocalyptic number.

It is an amenable number.

265553320664 is a deficient number, since it is larger than the sum of its proper divisors (237953679136).

265553320664 is a wasteful number, since it uses less digits than its factorization.

265553320664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372968242 (or 372968238 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 47.

The spelling of 265553320664 in words is "two hundred sixty-five billion, five hundred fifty-three million, three hundred twenty thousand, six hundred sixty-four".