264641593 has 12 divisors (see below), whose sum is σ = 274644468. Its totient is φ = 254831360.

The previous prime is 264641581. The next prime is 264641621. The reversal of 264641593 is 395146462.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 256416169 = 2868^2 + 16013^2 .

It is not a de Polignac number, because 264641593 - 2⁹ = 264641081 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 (264641563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1107168 + ... + 1107406.

It is an arithmetic number, because the mean of its divisors is an integer number (22887039).

Almost surely, 2^264641593 is an apocalyptic number.

It is an amenable number.

264641593 is a deficient number, since it is larger than the sum of its proper divisors (10002875).

264641593 is an equidigital number, since it uses as much as digits as its factorization.

264641593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 393 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 264641593 is about 16267.8084879310. The cubic root of 264641593 is about 642.0261252684.

The spelling of 264641593 in words is "two hundred sixty-four million, six hundred forty-one thousand, five hundred ninety-three".