640200648 has 16 divisors (see below), whose sum is σ = 1600501680. Its totient is φ = 213400208.

The previous prime is 640200643. The next prime is 640200667. The reversal of 640200648 is 846002046.

It is not an unprimeable number, because it can be changed into a prime (640200643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13337490 + ... + 13337537.

It is an arithmetic number, because the mean of its divisors is an integer number (100031355).

Almost surely, 2^640200648 is an apocalyptic number.

It is an amenable number.

640200648 is an abundant number, since it is smaller than the sum of its proper divisors (960301032).

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

640200648 is a wasteful number, since it uses less digits than its factorization.

640200648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26675036 (or 26675032 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 640200648 is about 25302.1866248749. The cubic root of 640200648 is about 861.8639255636.

The spelling of 640200648 in words is "six hundred forty million, two hundred thousand, six hundred forty-eight".