11976707861 has 2 divisors, whose sum is σ = 11976707862. Its totient is φ = 11976707860.

The previous prime is 11976707857. The next prime is 11976707929. The reversal of 11976707861 is 16870767911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11896264900 + 80442961 = 109070^2 + 8969^2 .

It is a cyclic number.

It is not a de Polignac number, because 11976707861 - 2² = 11976707857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11976707801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5988353930 + 5988353931.

It is an arithmetic number, because the mean of its divisors is an integer number (5988353931).

Almost surely, 2^11976707861 is an apocalyptic number.

It is an amenable number.

11976707861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11976707861 is an equidigital number, since it uses as much as digits as its factorization.

11976707861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 11976707861 in words is "eleven billion, nine hundred seventy-six million, seven hundred seven thousand, eight hundred sixty-one".