646510646 has 16 divisors (see below), whose sum is σ = 1029393360. Its totient is φ = 303475200.

The previous prime is 646510639. The next prime is 646510651. The reversal of 646510646 is 646015646.

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, 10076 + ... + 37343.

It is an arithmetic number, because the mean of its divisors is an integer number (64337085).

Almost surely, 2^646510646 is an apocalyptic number.

646510646 is a deficient number, since it is larger than the sum of its proper divisors (382882714).

646510646 is a wasteful number, since it uses less digits than its factorization.

646510646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47839.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 646510646 is about 25426.5736189523. The cubic root of 646510646 is about 864.6862644280.

The spelling of 646510646 in words is "six hundred forty-six million, five hundred ten thousand, six hundred forty-six".