11317272661 has 2 divisors, whose sum is σ = 11317272662. Its totient is φ = 11317272660.

The previous prime is 11317272587. The next prime is 11317272671. The reversal of 11317272661 is 16627271311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9772311025 + 1544961636 = 98855^2 + 39306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11317272661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11317272661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11317272671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5658636330 + 5658636331.

It is an arithmetic number, because the mean of its divisors is an integer number (5658636331).

Almost surely, 2^11317272661 is an apocalyptic number.

It is an amenable number.

11317272661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11317272661 is an equidigital number, since it uses as much as digits as its factorization.

11317272661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The spelling of 11317272661 in words is "eleven billion, three hundred seventeen million, two hundred seventy-two thousand, six hundred sixty-one".