646105855244 has 12 divisors (see below), whose sum is σ = 1161244307664. Its totient is φ = 314321767344.

The previous prime is 646105855217. The next prime is 646105855261. The reversal of 646105855244 is 442558501646.

It is a junction number, because it is equal to n+sod(n) for n = 646105855192 and 646105855201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182789904 + ... + 2182790199.

It is an arithmetic number, because the mean of its divisors is an integer number (96770358972).

Almost surely, 2^646105855244 is an apocalyptic number.

It is an amenable number.

646105855244 is a deficient number, since it is larger than the sum of its proper divisors (515138452420).

646105855244 is a wasteful number, since it uses less digits than its factorization.

646105855244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365580144 (or 4365580142 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 50.

The spelling of 646105855244 in words is "six hundred forty-six billion, one hundred five million, eight hundred fifty-five thousand, two hundred forty-four".