16445507189 has 2 divisors, whose sum is σ = 16445507190. Its totient is φ = 16445507188.

The previous prime is 16445507149. The next prime is 16445507207. The reversal of 16445507189 is 98170554461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9861483025 + 6584024164 = 99305^2 + 81142^2 .

It is a cyclic number.

It is not a de Polignac number, because 16445507189 - 2⁸ = 16445506933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16445507149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8222753594 + 8222753595.

It is an arithmetic number, because the mean of its divisors is an integer number (8222753595).

Almost surely, 2^16445507189 is an apocalyptic number.

It is an amenable number.

16445507189 is a deficient number, since it is larger than the sum of its proper divisors (1).

16445507189 is an equidigital number, since it uses as much as digits as its factorization.

16445507189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 16445507189 in words is "sixteen billion, four hundred forty-five million, five hundred seven thousand, one hundred eighty-nine".