11316511691 has 2 divisors, whose sum is σ = 11316511692. Its totient is φ = 11316511690.

The previous prime is 11316511651. The next prime is 11316511711. The reversal of 11316511691 is 19611561311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11316511691 is a prime.

It is not a weakly prime, because it can be changed into another prime (11316511651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5658255845 + 5658255846.

It is an arithmetic number, because the mean of its divisors is an integer number (5658255846).

Almost surely, 2^11316511691 is an apocalyptic number.

11316511691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11316511691 is an equidigital number, since it uses as much as digits as its factorization.

11316511691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 35.

The spelling of 11316511691 in words is "eleven billion, three hundred sixteen million, five hundred eleven thousand, six hundred ninety-one".