16885588817 has 2 divisors, whose sum is σ = 16885588818. Its totient is φ = 16885588816.

The previous prime is 16885588763. The next prime is 16885588823. The reversal of 16885588817 is 71888558861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9058470976 + 7827117841 = 95176^2 + 88471^2 .

It is a cyclic number.

It is not a de Polignac number, because 16885588817 - 2²⁰ = 16884540241 is a prime.

It is not a weakly prime, because it can be changed into another prime (16885588847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8442794408 + 8442794409.

It is an arithmetic number, because the mean of its divisors is an integer number (8442794409).

Almost surely, 2^16885588817 is an apocalyptic number.

It is an amenable number.

16885588817 is a deficient number, since it is larger than the sum of its proper divisors (1).

16885588817 is an equidigital number, since it uses as much as digits as its factorization.

16885588817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34406400, while the sum is 65.

The spelling of 16885588817 in words is "sixteen billion, eight hundred eighty-five million, five hundred eighty-eight thousand, eight hundred seventeen".