642553700 has 36 divisors (see below), whose sum is σ = 1395587760. Its totient is φ = 256791840.

The previous prime is 642553699. The next prime is 642553711. The reversal of 642553700 is 7355246.

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, 150191 + ... + 154409.

Almost surely, 2^642553700 is an apocalyptic number.

It is an amenable number.

642553700 is an abundant number, since it is smaller than the sum of its proper divisors (753034060).

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

642553700 is a wasteful number, since it uses less digits than its factorization.

642553700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756 (or 5749 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 642553700 is about 25348.6429617051. The cubic root of 642553700 is about 862.9185590112.

The spelling of 642553700 in words is "six hundred forty-two million, five hundred fifty-three thousand, seven hundred".