16515016613 has 2 divisors, whose sum is σ = 16515016614. Its totient is φ = 16515016612.

The previous prime is 16515016523. The next prime is 16515016667. The reversal of 16515016613 is 31661051561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15779630689 + 735385924 = 125617^2 + 27118^2 .

It is a cyclic number.

It is not a de Polignac number, because 16515016613 - 2³⁰ = 15441274789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16515016213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8257508306 + 8257508307.

It is an arithmetic number, because the mean of its divisors is an integer number (8257508307).

Almost surely, 2^16515016613 is an apocalyptic number.

It is an amenable number.

16515016613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16515016613 is an equidigital number, since it uses as much as digits as its factorization.

16515016613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 16515016613 in words is "sixteen billion, five hundred fifteen million, sixteen thousand, six hundred thirteen".