264640783 has 16 divisors (see below), whose sum is σ = 306374400. Its totient is φ = 226209280.

The previous prime is 264640781. The next prime is 264640811. The reversal of 264640783 is 387046462.

It is a happy number.

It is not a de Polignac number, because 264640783 - 2¹ = 264640781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264640781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6063 + ... + 23791.

It is an arithmetic number, because the mean of its divisors is an integer number (19148400).

Almost surely, 2^264640783 is an apocalyptic number.

264640783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

264640783 is a deficient number, since it is larger than the sum of its proper divisors (41733617).

264640783 is a wasteful number, since it uses less digits than its factorization.

264640783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17822.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 264640783 is about 16267.7835921185. The cubic root of 264640783 is about 642.0254702420.

The spelling of 264640783 in words is "two hundred sixty-four million, six hundred forty thousand, seven hundred eighty-three".