16696128517 has 2 divisors, whose sum is σ = 16696128518. Its totient is φ = 16696128516.

The previous prime is 16696128433. The next prime is 16696128541. The reversal of 16696128517 is 71582169661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16125444196 + 570684321 = 126986^2 + 23889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16696128517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16696128577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348064258 + 8348064259.

It is an arithmetic number, because the mean of its divisors is an integer number (8348064259).

Almost surely, 2^16696128517 is an apocalyptic number.

It is an amenable number.

16696128517 is a deficient number, since it is larger than the sum of its proper divisors (1).

16696128517 is an equidigital number, since it uses as much as digits as its factorization.

16696128517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 52.

The spelling of 16696128517 in words is "sixteen billion, six hundred ninety-six million, one hundred twenty-eight thousand, five hundred seventeen".