646376673646 has 16 divisors (see below), whose sum is σ = 1068179637168. Its totient is φ = 290898592000.

The previous prime is 646376673623. The next prime is 646376673659.

646376673646 is nontrivially palindromic in base 10.

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, 145447075 + ... + 145451518.

It is an arithmetic number, because the mean of its divisors is an integer number (66761227323).

Almost surely, 2^646376673646 is an apocalyptic number.

646376673646 is a deficient number, since it is larger than the sum of its proper divisors (421802963522).

646376673646 is a wasteful number, since it uses less digits than its factorization.

646376673646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290898707.

The product of its digits is 329204736, while the sum is 64.

The spelling of 646376673646 in words is "six hundred forty-six billion, three hundred seventy-six million, six hundred seventy-three thousand, six hundred forty-six".