264799865 has 32 divisors (see below), whose sum is σ = 367718400. Its totient is φ = 181033920.

The previous prime is 264799807. The next prime is 264799877. The reversal of 264799865 is 568997462.

It is a happy number.

It is not a de Polignac number, because 264799865 - 2¹⁴ = 264783481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 264799865.

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, 144344 + ... + 146166.

It is an arithmetic number, because the mean of its divisors is an integer number (11491200).

Almost surely, 2^264799865 is an apocalyptic number.

It is an amenable number.

264799865 is a deficient number, since it is larger than the sum of its proper divisors (102918535).

264799865 is a wasteful number, since it uses less digits than its factorization.

264799865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997.

The product of its digits is 6531840, while the sum is 56.

The square root of 264799865 is about 16272.6723373882. The cubic root of 264799865 is about 642.1540901727.

The spelling of 264799865 in words is "two hundred sixty-four million, seven hundred ninety-nine thousand, eight hundred sixty-five".