13616635997 has 2 divisors, whose sum is σ = 13616635998. Its totient is φ = 13616635996.

The previous prime is 13616635987. The next prime is 13616636009. The reversal of 13616635997 is 79953661631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9615567481 + 4001068516 = 98059^2 + 63254^2 .

It is an emirp because it is prime and its reverse (79953661631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13616635997 - 2²⁰ = 13615587421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13616635937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6808317998 + 6808317999.

It is an arithmetic number, because the mean of its divisors is an integer number (6808317999).

Almost surely, 2^13616635997 is an apocalyptic number.

It is an amenable number.

13616635997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13616635997 is an equidigital number, since it uses as much as digits as its factorization.

13616635997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 56.

The spelling of 13616635997 in words is "thirteen billion, six hundred sixteen million, six hundred thirty-five thousand, nine hundred ninety-seven".