16166973793 has 2 divisors, whose sum is σ = 16166973794. Its totient is φ = 16166973792.

The previous prime is 16166973763. The next prime is 16166973869. The reversal of 16166973793 is 39737966161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13226840064 + 2940133729 = 115008^2 + 54223^2 .

It is an emirp because it is prime and its reverse (39737966161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16166973793 - 2²⁵ = 16133419361 is a prime.

It is a super-2 number, since 2×16166973793² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16166973733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8083486896 + 8083486897.

It is an arithmetic number, because the mean of its divisors is an integer number (8083486897).

Almost surely, 2^16166973793 is an apocalyptic number.

It is an amenable number.

16166973793 is a deficient number, since it is larger than the sum of its proper divisors (1).

16166973793 is an equidigital number, since it uses as much as digits as its factorization.

16166973793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7715736, while the sum is 58.

The spelling of 16166973793 in words is "sixteen billion, one hundred sixty-six million, nine hundred seventy-three thousand, seven hundred ninety-three".