11916972689 has 2 divisors, whose sum is σ = 11916972690. Its totient is φ = 11916972688.

The previous prime is 11916972677. The next prime is 11916972703. The reversal of 11916972689 is 98627961911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11915905600 + 1067089 = 109160^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 11916972689 - 2⁸ = 11916972433 is a prime.

It is not a weakly prime, because it can be changed into another prime (11916972619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5958486344 + 5958486345.

It is an arithmetic number, because the mean of its divisors is an integer number (5958486345).

Almost surely, 2^11916972689 is an apocalyptic number.

It is an amenable number.

11916972689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11916972689 is an equidigital number, since it uses as much as digits as its factorization.

11916972689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 59.

The spelling of 11916972689 in words is "eleven billion, nine hundred sixteen million, nine hundred seventy-two thousand, six hundred eighty-nine".