646480100 has 36 divisors (see below), whose sum is σ = 1603272384. Its totient is φ = 221650080.

The previous prime is 646480057. The next prime is 646480129. The reversal of 646480100 is 1084646.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461072 + ... + 462471.

It is an arithmetic number, because the mean of its divisors is an integer number (44535344).

Almost surely, 2^646480100 is an apocalyptic number.

It is an amenable number.

646480100 is an abundant number, since it is smaller than the sum of its proper divisors (956792284).

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

646480100 is a wasteful number, since it uses less digits than its factorization.

646480100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923564 (or 923557 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 646480100 is about 25425.9729410695. The cubic root of 646480100 is about 864.6726461307.

The spelling of 646480100 in words is "six hundred forty-six million, four hundred eighty thousand, one hundred".