646940380176 has 60 divisors (see below), whose sum is σ = 1814621700528. Its totient is φ = 215159984832.

The previous prime is 646940380157. The next prime is 646940380189. The reversal of 646940380176 is 671083049646.

646940380176 is a `hidden beast` number, since 6 + 4 + 6 + 94 + 0 + 380 + 176 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5006910 + ... + 5134493.

Almost surely, 2^646940380176 is an apocalyptic number.

It is an amenable number.

646940380176 is an abundant number, since it is smaller than the sum of its proper divisors (1167681320352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646940380176 is a wasteful number, since it uses less digits than its factorization.

646940380176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10141860 (or 10141851 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 646940380176 in words is "six hundred forty-six billion, nine hundred forty million, three hundred eighty thousand, one hundred seventy-six".