641650235800 has 96 divisors (see below), whose sum is σ = 1763748050400. Its totient is φ = 212408340480.

The previous prime is 641650235701. The next prime is 641650235813. The reversal of 641650235800 is 8532056146.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7861497 + ... + 7942696.

It is an arithmetic number, because the mean of its divisors is an integer number (18372375525).

Almost surely, 2^641650235800 is an apocalyptic number.

It is an amenable number.

641650235800 is an abundant number, since it is smaller than the sum of its proper divisors (1122097814600).

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

641650235800 is a wasteful number, since it uses less digits than its factorization.

641650235800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15804245 (or 15804236 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 641650235800 in words is "six hundred forty-one billion, six hundred fifty million, two hundred thirty-five thousand, eight hundred".