265736591 has 2 divisors, whose sum is σ = 265736592. Its totient is φ = 265736590.

The previous prime is 265736587. The next prime is 265736593. The reversal of 265736591 is 195637562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265736591 - 2² = 265736587 is a prime.

It is a Sophie Germain prime.

Together with 265736593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265736593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132868295 + 132868296.

It is an arithmetic number, because the mean of its divisors is an integer number (132868296).

Almost surely, 2^265736591 is an apocalyptic number.

265736591 is a deficient number, since it is larger than the sum of its proper divisors (1).

265736591 is an equidigital number, since it uses as much as digits as its factorization.

265736591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 265736591 is about 16301.4291091303. The cubic root of 265736591 is about 642.9104029077.

The spelling of 265736591 in words is "two hundred sixty-five million, seven hundred thirty-six thousand, five hundred ninety-one".