264615643 has 2 divisors, whose sum is σ = 264615644. Its totient is φ = 264615642.

The previous prime is 264615623. The next prime is 264615647. The reversal of 264615643 is 346516462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264615643 - 2¹³ = 264607451 is a prime.

It is not a weakly prime, because it can be changed into another prime (264615647) 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 as a sum of consecutive naturals, namely, 132307821 + 132307822.

It is an arithmetic number, because the mean of its divisors is an integer number (132307822).

Almost surely, 2^264615643 is an apocalyptic number.

264615643 is a deficient number, since it is larger than the sum of its proper divisors (1).

264615643 is an equidigital number, since it uses as much as digits as its factorization.

264615643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 37.

The square root of 264615643 is about 16267.0108809209. The cubic root of 264615643 is about 642.0051394988.

The spelling of 264615643 in words is "two hundred sixty-four million, six hundred fifteen thousand, six hundred forty-three".