641634200 has 48 divisors (see below), whose sum is σ = 1493743680. Its totient is φ = 256319360.

The previous prime is 641634137. The next prime is 641634209. The reversal of 641634200 is 2436146.

It is a self number, because there is not a number n which added to its sum of digits gives 641634200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641634209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201017 + ... + 204183.

It is an arithmetic number, because the mean of its divisors is an integer number (31119660).

Almost surely, 2^641634200 is an apocalyptic number.

It is an amenable number.

641634200 is an abundant number, since it is smaller than the sum of its proper divisors (852109480).

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

641634200 is a wasteful number, since it uses less digits than its factorization.

641634200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196 (or 4187 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 641634200 is about 25330.4994028937. The cubic root of 641634200 is about 862.5067478293.

The spelling of 641634200 in words is "six hundred forty-one million, six hundred thirty-four thousand, two hundred".