264618631 has 2 divisors, whose sum is σ = 264618632. Its totient is φ = 264618630.

The previous prime is 264618623. The next prime is 264618647. The reversal of 264618631 is 136816462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264618631 - 2³ = 264618623 is a prime.

It is a super-2 number, since 2×264618631² = 140046039744628322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264618031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132309315 + 132309316.

It is an arithmetic number, because the mean of its divisors is an integer number (132309316).

Almost surely, 2^264618631 is an apocalyptic number.

264618631 is a deficient number, since it is larger than the sum of its proper divisors (1).

264618631 is an equidigital number, since it uses as much as digits as its factorization.

264618631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 264618631 is about 16267.1027229805. The cubic root of 264618631 is about 642.0075559648.

The spelling of 264618631 in words is "two hundred sixty-four million, six hundred eighteen thousand, six hundred thirty-one".