16905116957 has 2 divisors, whose sum is σ = 16905116958. Its totient is φ = 16905116956.

The previous prime is 16905116953. The next prime is 16905117041. The reversal of 16905116957 is 75961150961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12334545721 + 4570571236 = 111061^2 + 67606^2 .

It is a cyclic number.

It is not a de Polignac number, because 16905116957 - 2² = 16905116953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16905116951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8452558478 + 8452558479.

It is an arithmetic number, because the mean of its divisors is an integer number (8452558479).

Almost surely, 2^16905116957 is an apocalyptic number.

It is an amenable number.

16905116957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16905116957 is an equidigital number, since it uses as much as digits as its factorization.

16905116957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 510300, while the sum is 50.

The spelling of 16905116957 in words is "sixteen billion, nine hundred five million, one hundred sixteen thousand, nine hundred fifty-seven".