11715562861 has 2 divisors, whose sum is σ = 11715562862. Its totient is φ = 11715562860.

The previous prime is 11715562853. The next prime is 11715562867. The reversal of 11715562861 is 16826551711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9624787236 + 2090775625 = 98106^2 + 45725^2 .

It is an emirp because it is prime and its reverse (16826551711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11715562861 - 2³ = 11715562853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11715562867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5857781430 + 5857781431.

It is an arithmetic number, because the mean of its divisors is an integer number (5857781431).

Almost surely, 2^11715562861 is an apocalyptic number.

It is an amenable number.

11715562861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11715562861 is an equidigital number, since it uses as much as digits as its factorization.

11715562861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 43.

The spelling of 11715562861 in words is "eleven billion, seven hundred fifteen million, five hundred sixty-two thousand, eight hundred sixty-one".