646356330 has 48 divisors (see below), whose sum is σ = 1725954984. Its totient is φ = 167702400.

The previous prime is 646356329. The next prime is 646356331. The reversal of 646356330 is 33653646.

It is a happy number.

646356330 is a `hidden beast` number, since 6 + 4 + 63 + 563 + 30 = 666.

646356330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (646356329) and next prime (646356331).

It can be written as a sum of positive squares in 4 ways, for example, as 489781161 + 156575169 = 22131^2 + 12513^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (646356331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93721 + ... + 100380.

Almost surely, 2^646356330 is an apocalyptic number.

646356330 is an abundant number, since it is smaller than the sum of its proper divisors (1079598654).

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

646356330 is a wasteful number, since it uses less digits than its factorization.

646356330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194151 (or 194148 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

The square root of 646356330 is about 25423.5388960703. The cubic root of 646356330 is about 864.6174614654.

The spelling of 646356330 in words is "six hundred forty-six million, three hundred fifty-six thousand, three hundred thirty".