39945039163 has 2 divisors, whose sum is σ = 39945039164. Its totient is φ = 39945039162.

The previous prime is 39945039151. The next prime is 39945039187. The reversal of 39945039163 is 36193054993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39945039163 - 2²⁵ = 39911484731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39945039163.

It is not a weakly prime, because it can be changed into another prime (39945039763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972519581 + 19972519582.

It is an arithmetic number, because the mean of its divisors is an integer number (19972519582).

Almost surely, 2^39945039163 is an apocalyptic number.

39945039163 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945039163 is an equidigital number, since it uses as much as digits as its factorization.

39945039163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 52.

The spelling of 39945039163 in words is "thirty-nine billion, nine hundred forty-five million, thirty-nine thousand, one hundred sixty-three".