646346364 has 12 divisors (see below), whose sum is σ = 1508141544. Its totient is φ = 215448784.

The previous prime is 646346359. The next prime is 646346399. The reversal of 646346364 is 463643646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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, 26931087 + ... + 26931110.

It is an arithmetic number, because the mean of its divisors is an integer number (125678462).

Almost surely, 2^646346364 is an apocalyptic number.

It is an amenable number.

646346364 is an abundant number, since it is smaller than the sum of its proper divisors (861795180).

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

646346364 is a wasteful number, since it uses less digits than its factorization.

646346364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53862204 (or 53862202 counting only the distinct ones).

The product of its digits is 746496, while the sum is 42.

The square root of 646346364 is about 25423.3428958507. The cubic root of 646346364 is about 864.6130176720.

The spelling of 646346364 in words is "six hundred forty-six million, three hundred forty-six thousand, three hundred sixty-four".