11516412989 has 2 divisors, whose sum is σ = 11516412990. Its totient is φ = 11516412988.

The previous prime is 11516412949. The next prime is 11516412997. The reversal of 11516412989 is 98921461511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8220504889 + 3295908100 = 90667^2 + 57410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11516412989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11516412949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758206494 + 5758206495.

It is an arithmetic number, because the mean of its divisors is an integer number (5758206495).

Almost surely, 2^11516412989 is an apocalyptic number.

It is an amenable number.

11516412989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11516412989 is an equidigital number, since it uses as much as digits as its factorization.

11516412989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 47.

The spelling of 11516412989 in words is "eleven billion, five hundred sixteen million, four hundred twelve thousand, nine hundred eighty-nine".