640375600 has 60 divisors (see below), whose sum is σ = 1545441760. Its totient is φ = 254995200.

The previous prime is 640375577. The next prime is 640375643. The reversal of 640375600 is 6573046.

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, 88105 + ... + 95095.

Almost surely, 2^640375600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640375600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772720880).

640375600 is an abundant number, since it is smaller than the sum of its proper divisors (905066160).

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

640375600 is a wasteful number, since it uses less digits than its factorization.

640375600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7238 (or 7227 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 640375600 is about 25305.6436393149. The cubic root of 640375600 is about 861.9424275587.

The spelling of 640375600 in words is "six hundred forty million, three hundred seventy-five thousand, six hundred".