646463500 has 24 divisors (see below), whose sum is σ = 1411877376. Its totient is φ = 258585200.

The previous prime is 646463483. The next prime is 646463533. The reversal of 646463500 is 5364646.

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, 645964 + ... + 646963.

It is an arithmetic number, because the mean of its divisors is an integer number (58828224).

Almost surely, 2^646463500 is an apocalyptic number.

It is an amenable number.

646463500 is an abundant number, since it is smaller than the sum of its proper divisors (765413876).

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

646463500 is a wasteful number, since it uses less digits than its factorization.

646463500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292946 (or 1292934 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 646463500 is about 25425.6465011217. The cubic root of 646463500 is about 864.6652451868.

The spelling of 646463500 in words is "six hundred forty-six million, four hundred sixty-three thousand, five hundred".