646650364 has 12 divisors (see below), whose sum is σ = 1137564288. Its totient is φ = 321632000.

The previous prime is 646650317. The next prime is 646650391. The reversal of 646650364 is 463056646.

It is a super-2 number, since 2×646650364² = 836313386522664992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422437 + ... + 423964.

It is an arithmetic number, because the mean of its divisors is an integer number (94797024).

Almost surely, 2^646650364 is an apocalyptic number.

It is an amenable number.

646650364 is a deficient number, since it is larger than the sum of its proper divisors (490913924).

646650364 is a wasteful number, since it uses less digits than its factorization.

646650364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846596 (or 846594 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 646650364 is about 25429.3209504304. The cubic root of 646650364 is about 864.7485493181.

The spelling of 646650364 in words is "six hundred forty-six million, six hundred fifty thousand, three hundred sixty-four".