16699235317889 has 2 divisors, whose sum is σ = 16699235317890. Its totient is φ = 16699235317888.

The previous prime is 16699235317819. The next prime is 16699235317903. The reversal of 16699235317889 is 98871353299661.

16699235317889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9735442107889 + 6963793210000 = 3120167^2 + 2638900^2 .

It is a cyclic number.

It is not a de Polignac number, because 16699235317889 - 2³⁶ = 16630515841153 is a prime.

It is not a weakly prime, because it can be changed into another prime (16699235317819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8349617658944 + 8349617658945.

It is an arithmetic number, because the mean of its divisors is an integer number (8349617658945).

Almost surely, 2^{16699235317889} is an apocalyptic number.

It is an amenable number.

16699235317889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16699235317889 is an equidigital number, since it uses as much as digits as its factorization.

16699235317889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058158080, while the sum is 77.

The spelling of 16699235317889 in words is "sixteen trillion, six hundred ninety-nine billion, two hundred thirty-five million, three hundred seventeen thousand, eight hundred eighty-nine".