644002160299 has 2 divisors, whose sum is σ = 644002160300. Its totient is φ = 644002160298.

The previous prime is 644002160233. The next prime is 644002160311. The reversal of 644002160299 is 992061200446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 644002160299 - 2³¹ = 641854676651 is a prime.

It is not a weakly prime, because it can be changed into another prime (644002167299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322001080149 + 322001080150.

It is an arithmetic number, because the mean of its divisors is an integer number (322001080150).

Almost surely, 2^644002160299 is an apocalyptic number.

644002160299 is a deficient number, since it is larger than the sum of its proper divisors (1).

644002160299 is an equidigital number, since it uses as much as digits as its factorization.

644002160299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 644002160299 in words is "six hundred forty-four billion, two million, one hundred sixty thousand, two hundred ninety-nine".