646790736576 has 56 divisors (see below), whose sum is σ = 1711524989440. Its totient is φ = 215568628992.

The previous prime is 646790736541. The next prime is 646790736601. The reversal of 646790736576 is 675637097646.

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, 1272645 + ... + 1706811.

It is an arithmetic number, because the mean of its divisors is an integer number (30562946240).

Almost surely, 2^646790736576 is an apocalyptic number.

It is an amenable number.

646790736576 is an abundant number, since it is smaller than the sum of its proper divisors (1064734252864).

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

646790736576 is a wasteful number, since it uses less digits than its factorization.

646790736576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441941 (or 441931 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 66.

The spelling of 646790736576 in words is "six hundred forty-six billion, seven hundred ninety million, seven hundred thirty-six thousand, five hundred seventy-six".