16613957249 has 2 divisors, whose sum is σ = 16613957250. Its totient is φ = 16613957248.

The previous prime is 16613957177. The next prime is 16613957279. The reversal of 16613957249 is 94275931661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12179329600 + 4434627649 = 110360^2 + 66593^2 .

It is a cyclic number.

It is not a de Polignac number, because 16613957249 - 2²⁰ = 16612908673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16613957249.

It is not a weakly prime, because it can be changed into another prime (16613957279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8306978624 + 8306978625.

It is an arithmetic number, because the mean of its divisors is an integer number (8306978625).

Almost surely, 2^16613957249 is an apocalyptic number.

It is an amenable number.

16613957249 is a deficient number, since it is larger than the sum of its proper divisors (1).

16613957249 is an equidigital number, since it uses as much as digits as its factorization.

16613957249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The spelling of 16613957249 in words is "sixteen billion, six hundred thirteen million, nine hundred fifty-seven thousand, two hundred forty-nine".