11515262491 has 2 divisors, whose sum is σ = 11515262492. Its totient is φ = 11515262490.

The previous prime is 11515262483. The next prime is 11515262557. The reversal of 11515262491 is 19426251511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11515262491 - 2³ = 11515262483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11515262491.

It is not a weakly prime, because it can be changed into another prime (11515262461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757631245 + 5757631246.

It is an arithmetic number, because the mean of its divisors is an integer number (5757631246).

Almost surely, 2^11515262491 is an apocalyptic number.

11515262491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515262491 is an equidigital number, since it uses as much as digits as its factorization.

11515262491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 37.

The spelling of 11515262491 in words is "eleven billion, five hundred fifteen million, two hundred sixty-two thousand, four hundred ninety-one".