644402483 has 2 divisors, whose sum is σ = 644402484. Its totient is φ = 644402482.

The previous prime is 644402413. The next prime is 644402503. The reversal of 644402483 is 384204446.

644402483 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 644402483 - 2²⁴ = 627625267 is a prime.

It is not a weakly prime, because it can be changed into another prime (644402413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322201241 + 322201242.

It is an arithmetic number, because the mean of its divisors is an integer number (322201242).

Almost surely, 2^644402483 is an apocalyptic number.

644402483 is a deficient number, since it is larger than the sum of its proper divisors (1).

644402483 is an equidigital number, since it uses as much as digits as its factorization.

644402483 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 35.

The square root of 644402483 is about 25385.0838682877. The cubic root of 644402483 is about 863.7453752677.

The spelling of 644402483 in words is "six hundred forty-four million, four hundred two thousand, four hundred eighty-three".