16390045791697 has 2 divisors, whose sum is σ = 16390045791698. Its totient is φ = 16390045791696.

The previous prime is 16390045791667. The next prime is 16390045791773. The reversal of 16390045791697 is 79619754009361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12087922679361 + 4302123112336 = 3476769^2 + 2074156^2 .

It is an emirp because it is prime and its reverse (79619754009361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16390045791697 is a prime.

It is not a weakly prime, because it can be changed into another prime (16390045791667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195022895848 + 8195022895849.

It is an arithmetic number, because the mean of its divisors is an integer number (8195022895849).

Almost surely, 2^{16390045791697} is an apocalyptic number.

It is an amenable number.

16390045791697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16390045791697 is an equidigital number, since it uses as much as digits as its factorization.

16390045791697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77157360, while the sum is 67.

The spelling of 16390045791697 in words is "sixteen trillion, three hundred ninety billion, forty-five million, seven hundred ninety-one thousand, six hundred ninety-seven".