265664364 has 24 divisors (see below), whose sum is σ = 708438528. Its totient is φ = 75904080.

The previous prime is 265664353. The next prime is 265664381. The reversal of 265664364 is 463466562.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581252 + ... + 1581419.

It is an arithmetic number, because the mean of its divisors is an integer number (29518272).

Almost surely, 2^265664364 is an apocalyptic number.

It is an amenable number.

265664364 is an abundant number, since it is smaller than the sum of its proper divisors (442774164).

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

265664364 is a wasteful number, since it uses less digits than its factorization.

265664364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162685 (or 3162683 counting only the distinct ones).

The product of its digits is 622080, while the sum is 42.

The square root of 265664364 is about 16299.2136006618. The cubic root of 265664364 is about 642.8521501129.

The spelling of 265664364 in words is "two hundred sixty-five million, six hundred sixty-four thousand, three hundred sixty-four".