11611116691 has 2 divisors, whose sum is σ = 11611116692. Its totient is φ = 11611116690.

The previous prime is 11611116577. The next prime is 11611116709. The reversal of 11611116691 is 19661111611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11611116691 - 2²³ = 11602728083 is a prime.

It is not a weakly prime, because it can be changed into another prime (11611116791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805558345 + 5805558346.

It is an arithmetic number, because the mean of its divisors is an integer number (5805558346).

Almost surely, 2^11611116691 is an apocalyptic number.

11611116691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611116691 is an equidigital number, since it uses as much as digits as its factorization.

11611116691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 34.

The spelling of 11611116691 in words is "eleven billion, six hundred eleven million, one hundred sixteen thousand, six hundred ninety-one".