11310777661 has 2 divisors, whose sum is σ = 11310777662. Its totient is φ = 11310777660.

The previous prime is 11310777649. The next prime is 11310777683. The reversal of 11310777661 is 16677701311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11086826436 + 223951225 = 105294^2 + 14965^2 .

It is an emirp because it is prime and its reverse (16677701311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11310777661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11310777631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655388830 + 5655388831.

It is an arithmetic number, because the mean of its divisors is an integer number (5655388831).

Almost surely, 2^11310777661 is an apocalyptic number.

It is an amenable number.

11310777661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11310777661 is an equidigital number, since it uses as much as digits as its factorization.

11310777661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 40.

The spelling of 11310777661 in words is "eleven billion, three hundred ten million, seven hundred seventy-seven thousand, six hundred sixty-one".