816616615499 has 2 divisors, whose sum is σ = 816616615500. Its totient is φ = 816616615498.

The previous prime is 816616615447. The next prime is 816616615513. The reversal of 816616615499 is 994516616618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816616615499 - 2¹⁶ = 816616549963 is a prime.

It is not a weakly prime, because it can be changed into another prime (816616612499) 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, 408308307749 + 408308307750.

It is an arithmetic number, because the mean of its divisors is an integer number (408308307750).

Almost surely, 2^816616615499 is an apocalyptic number.

816616615499 is a deficient number, since it is larger than the sum of its proper divisors (1).

816616615499 is an equidigital number, since it uses as much as digits as its factorization.

816616615499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 62.

The spelling of 816616615499 in words is "eight hundred sixteen billion, six hundred sixteen million, six hundred fifteen thousand, four hundred ninety-nine".