11591058961 has 2 divisors, whose sum is σ = 11591058962. Its totient is φ = 11591058960.

The previous prime is 11591058883. The next prime is 11591058967. The reversal of 11591058961 is 16985019511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11151360000 + 439698961 = 105600^2 + 20969^2 .

It is an emirp because it is prime and its reverse (16985019511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11591058961 - 2⁷ = 11591058833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11591058967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5795529480 + 5795529481.

It is an arithmetic number, because the mean of its divisors is an integer number (5795529481).

Almost surely, 2^11591058961 is an apocalyptic number.

It is an amenable number.

11591058961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11591058961 is an equidigital number, since it uses as much as digits as its factorization.

11591058961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 46.

The spelling of 11591058961 in words is "eleven billion, five hundred ninety-one million, fifty-eight thousand, nine hundred sixty-one".