16688146897 has 2 divisors, whose sum is σ = 16688146898. Its totient is φ = 16688146896.

The previous prime is 16688146859. The next prime is 16688146903. The reversal of 16688146897 is 79864188661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16354317456 + 333829441 = 127884^2 + 18271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16688146897 is a prime.

It is not a weakly prime, because it can be changed into another prime (16688146817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344073448 + 8344073449.

It is an arithmetic number, because the mean of its divisors is an integer number (8344073449).

Almost surely, 2^16688146897 is an apocalyptic number.

It is an amenable number.

16688146897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16688146897 is an equidigital number, since it uses as much as digits as its factorization.

16688146897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 64.

The spelling of 16688146897 in words is "sixteen billion, six hundred eighty-eight million, one hundred forty-six thousand, eight hundred ninety-seven".