16171064649917 has 2 divisors, whose sum is σ = 16171064649918. Its totient is φ = 16171064649916.

The previous prime is 16171064649821. The next prime is 16171064649919. The reversal of 16171064649917 is 71994646017161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13869211291321 + 2301853358596 = 3724139^2 + 1517186^2 .

It is a cyclic number.

It is not a de Polignac number, because 16171064649917 - 2³² = 16166769682621 is a prime.

Together with 16171064649919, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16171064649917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16171064649919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8085532324958 + 8085532324959.

It is an arithmetic number, because the mean of its divisors is an integer number (8085532324959).

Almost surely, 2^{16171064649917} is an apocalyptic number.

It is an amenable number.

16171064649917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16171064649917 is an equidigital number, since it uses as much as digits as its factorization.

16171064649917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 16171064649917 in words is "sixteen trillion, one hundred seventy-one billion, sixty-four million, six hundred forty-nine thousand, nine hundred seventeen".