646332316 has 36 divisors (see below), whose sum is σ = 1373193808. Its totient is φ = 260702208.

The previous prime is 646332311. The next prime is 646332353. The reversal of 646332316 is 613233646.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646332311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31845 + ... + 48028.

Almost surely, 2^646332316 is an apocalyptic number.

It is an amenable number.

646332316 is an abundant number, since it is smaller than the sum of its proper divisors (726861492).

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

646332316 is a wasteful number, since it uses less digits than its factorization.

646332316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79918 (or 79899 counting only the distinct ones).

The product of its digits is 46656, while the sum is 34.

The square root of 646332316 is about 25423.0666128223. The cubic root of 646332316 is about 864.6067536561.

The spelling of 646332316 in words is "six hundred forty-six million, three hundred thirty-two thousand, three hundred sixteen".