264756645 has 24 divisors (see below), whose sum is σ = 471317496. Its totient is φ = 137386368.

The previous prime is 264756643. The next prime is 264756671. The reversal of 264756645 is 546657462.

264756645 is a `hidden beast` number, since 2 + 6 + 47 + 566 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 88849476 + 175907169 = 9426^2 + 13263^2 .

It is not a de Polignac number, because 264756645 - 2¹ = 264756643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 264756645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264756643) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 77842 + ... + 81171.

It is an arithmetic number, because the mean of its divisors is an integer number (19638229).

Almost surely, 2^264756645 is an apocalyptic number.

It is an amenable number.

264756645 is a deficient number, since it is larger than the sum of its proper divisors (206560851).

264756645 is a wasteful number, since it uses less digits than its factorization.

264756645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159061 (or 159058 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 264756645 is about 16271.3442898858. The cubic root of 264756645 is about 642.1191513207.

The spelling of 264756645 in words is "two hundred sixty-four million, seven hundred fifty-six thousand, six hundred forty-five".