646063043644 has 24 divisors (see below), whose sum is σ = 1152186856128. Its totient is φ = 316869384000.

The previous prime is 646063043603. The next prime is 646063043677. The reversal of 646063043644 is 446340360646.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 646063043594 and 646063043603.

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, 686494 + ... + 1327930.

It is an arithmetic number, because the mean of its divisors is an integer number (48007785672).

Almost surely, 2^646063043644 is an apocalyptic number.

It is an amenable number.

646063043644 is a deficient number, since it is larger than the sum of its proper divisors (506123812484).

646063043644 is a wasteful number, since it uses less digits than its factorization.

646063043644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646245 (or 646243 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 46.

The spelling of 646063043644 in words is "six hundred forty-six billion, sixty-three million, forty-three thousand, six hundred forty-four".