16864317973 has 2 divisors, whose sum is σ = 16864317974. Its totient is φ = 16864317972.

The previous prime is 16864317947. The next prime is 16864317983. The reversal of 16864317973 is 37971346861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16864139044 + 178929 = 129862^2 + 423^2 .

It is a cyclic number.

It is not a de Polignac number, because 16864317973 - 2¹⁷ = 16864186901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864317983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432158986 + 8432158987.

It is an arithmetic number, because the mean of its divisors is an integer number (8432158987).

Almost surely, 2^16864317973 is an apocalyptic number.

It is an amenable number.

16864317973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864317973 is an equidigital number, since it uses as much as digits as its factorization.

16864317973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The spelling of 16864317973 in words is "sixteen billion, eight hundred sixty-four million, three hundred seventeen thousand, nine hundred seventy-three".