646551032 has 8 divisors (see below), whose sum is σ = 1212283200. Its totient is φ = 323275512.

The previous prime is 646551029. The next prime is 646551067. The reversal of 646551032 is 230155646.

646551032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 646551032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40409432 + ... + 40409447.

It is an arithmetic number, because the mean of its divisors is an integer number (151535400).

Almost surely, 2^646551032 is an apocalyptic number.

It is an amenable number.

646551032 is a deficient number, since it is larger than the sum of its proper divisors (565732168).

646551032 is a wasteful number, since it uses less digits than its factorization.

646551032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80818885 (or 80818881 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 646551032 is about 25427.3677756861. The cubic root of 646551032 is about 864.7042690258.

The spelling of 646551032 in words is "six hundred forty-six million, five hundred fifty-one thousand, thirty-two".