640560600 has 72 divisors (see below), whose sum is σ = 2151222060. Its totient is φ = 170815680.

The previous prime is 640560577. The next prime is 640560601. The reversal of 640560600 is 6065046.

640560600 is a `hidden beast` number, since 6 + 4 + 0 + 56 + 0 + 600 = 666.

640560600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640560601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 176134 + ... + 179733.

Almost surely, 2^640560600 is an apocalyptic number.

640560600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640560600 is an abundant number, since it is smaller than the sum of its proper divisors (1510661460).

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

640560600 is a wasteful number, since it uses less digits than its factorization.

640560600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355889 (or 355877 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 640560600 is about 25309.2986864512. The cubic root of 640560600 is about 862.0254225989.

The spelling of 640560600 in words is "six hundred forty million, five hundred sixty thousand, six hundred".