265605164 has 18 divisors (see below), whose sum is σ = 510906732. Its totient is φ = 120729400.

The previous prime is 265605139. The next prime is 265605181. The reversal of 265605164 is 461506562.

265605164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×265605164² = 141092206286933792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273902 + ... + 274869.

Almost surely, 2^265605164 is an apocalyptic number.

It is an amenable number.

265605164 is a deficient number, since it is larger than the sum of its proper divisors (245301568).

265605164 is a wasteful number, since it uses less digits than its factorization.

265605164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548797 (or 548784 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 265605164 is about 16297.3974609445. The cubic root of 265605164 is about 642.8043960296.

The spelling of 265605164 in words is "two hundred sixty-five million, six hundred five thousand, one hundred sixty-four".