646455468 has 24 divisors (see below), whose sum is σ = 1587785920. Its totient is φ = 204143760.

The previous prime is 646455419. The next prime is 646455473. The reversal of 646455468 is 864554646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417438 + ... + 1417893.

Almost surely, 2^646455468 is an apocalyptic number.

It is an amenable number.

646455468 is an abundant number, since it is smaller than the sum of its proper divisors (941330452).

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

646455468 is a wasteful number, since it uses less digits than its factorization.

646455468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835357 (or 2835355 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 48.

The square root of 646455468 is about 25425.4885498784. The cubic root of 646455468 is about 864.6616641545.

The spelling of 646455468 in words is "six hundred forty-six million, four hundred fifty-five thousand, four hundred sixty-eight".