265691042664 has 64 divisors (see below), whose sum is σ = 666675609600. Its totient is φ = 88237854144.

The previous prime is 265691042633. The next prime is 265691042689. The reversal of 265691042664 is 466240196562.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7642329 + ... + 7677015.

It is an arithmetic number, because the mean of its divisors is an integer number (10416806400).

Almost surely, 2^265691042664 is an apocalyptic number.

265691042664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

265691042664 is an abundant number, since it is smaller than the sum of its proper divisors (400984566936).

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

265691042664 is a wasteful number, since it uses less digits than its factorization.

265691042664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35862 (or 35858 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 265691042664 in words is "two hundred sixty-five billion, six hundred ninety-one million, forty-two thousand, six hundred sixty-four".