11515316611091 has 2 divisors, whose sum is σ = 11515316611092. Its totient is φ = 11515316611090.

The previous prime is 11515316611087. The next prime is 11515316611157. The reversal of 11515316611091 is 19011661351511.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19011661351511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11515316611091 - 2² = 11515316611087 is a prime.

It is not a weakly prime, because it can be changed into another prime (11515316611291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757658305545 + 5757658305546.

It is an arithmetic number, because the mean of its divisors is an integer number (5757658305546).

Almost surely, 2^{11515316611091} is an apocalyptic number.

11515316611091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515316611091 is an equidigital number, since it uses as much as digits as its factorization.

11515316611091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 41.

The spelling of 11515316611091 in words is "eleven trillion, five hundred fifteen billion, three hundred sixteen million, six hundred eleven thousand, ninety-one".