11517716491 has 2 divisors, whose sum is σ = 11517716492. Its totient is φ = 11517716490.

The previous prime is 11517716479. The next prime is 11517716503. The reversal of 11517716491 is 19461771511.

It is a balanced prime because it is at equal distance from previous prime (11517716479) and next prime (11517716503).

It is a cyclic number.

It is not a de Polignac number, because 11517716491 - 2¹³ = 11517708299 is a prime.

It is not a weakly prime, because it can be changed into another prime (11517716591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758858245 + 5758858246.

It is an arithmetic number, because the mean of its divisors is an integer number (5758858246).

Almost surely, 2^11517716491 is an apocalyptic number.

11517716491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11517716491 is an equidigital number, since it uses as much as digits as its factorization.

11517716491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 43.

The spelling of 11517716491 in words is "eleven billion, five hundred seventeen million, seven hundred sixteen thousand, four hundred ninety-one".