16645170379 has 2 divisors, whose sum is σ = 16645170380. Its totient is φ = 16645170378.

The previous prime is 16645170359. The next prime is 16645170431. The reversal of 16645170379 is 97307154661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16645170379 - 2⁷ = 16645170251 is a prime.

It is not a weakly prime, because it can be changed into another prime (16645170359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322585189 + 8322585190.

It is an arithmetic number, because the mean of its divisors is an integer number (8322585190).

Almost surely, 2^16645170379 is an apocalyptic number.

16645170379 is a deficient number, since it is larger than the sum of its proper divisors (1).

16645170379 is an equidigital number, since it uses as much as digits as its factorization.

16645170379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 16645170379 in words is "sixteen billion, six hundred forty-five million, one hundred seventy thousand, three hundred seventy-nine".