646044422245 has 8 divisors (see below), whose sum is σ = 776560651416. Its totient is φ = 515963974656.

The previous prime is 646044422213. The next prime is 646044422251. The reversal of 646044422245 is 542224440646.

It can be written as a sum of positive squares in 4 ways, for example, as 88228449 + 645956193796 = 9393^2 + 803714^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646044422245 - 2⁵ = 646044422213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108942132 + ... + 108948061.

It is an arithmetic number, because the mean of its divisors is an integer number (97070081427).

Almost surely, 2^646044422245 is an apocalyptic number.

It is an amenable number.

646044422245 is a deficient number, since it is larger than the sum of its proper divisors (130516229171).

646044422245 is a wasteful number, since it uses less digits than its factorization.

646044422245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217890791.

The product of its (nonzero) digits is 1474560, while the sum is 43.

The spelling of 646044422245 in words is "six hundred forty-six billion, forty-four million, four hundred twenty-two thousand, two hundred forty-five".