16940170957 has 2 divisors, whose sum is σ = 16940170958. Its totient is φ = 16940170956.

The previous prime is 16940170873. The next prime is 16940170963. The reversal of 16940170957 is 75907104961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11970766921 + 4969404036 = 109411^2 + 70494^2 .

It is an emirp because it is prime and its reverse (75907104961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16940170957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16940170957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16940170967) 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, 8470085478 + 8470085479.

It is an arithmetic number, because the mean of its divisors is an integer number (8470085479).

Almost surely, 2^16940170957 is an apocalyptic number.

It is an amenable number.

16940170957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16940170957 is an equidigital number, since it uses as much as digits as its factorization.

16940170957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The spelling of 16940170957 in words is "sixteen billion, nine hundred forty million, one hundred seventy thousand, nine hundred fifty-seven".