265841297591 has 2 divisors, whose sum is σ = 265841297592. Its totient is φ = 265841297590.

The previous prime is 265841297581. The next prime is 265841297621. The reversal of 265841297591 is 195792148562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265841297591 - 2¹⁴ = 265841281207 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265841297591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265841297531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132920648795 + 132920648796.

It is an arithmetic number, because the mean of its divisors is an integer number (132920648796).

Almost surely, 2^265841297591 is an apocalyptic number.

265841297591 is a deficient number, since it is larger than the sum of its proper divisors (1).

265841297591 is an equidigital number, since it uses as much as digits as its factorization.

265841297591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 59.

The spelling of 265841297591 in words is "two hundred sixty-five billion, eight hundred forty-one million, two hundred ninety-seven thousand, five hundred ninety-one".