641983850 has 12 divisors (see below), whose sum is σ = 1194090054. Its totient is φ = 256793520.

The previous prime is 641983841. The next prime is 641983873. The reversal of 641983850 is 58389146.

641983850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 428034721 + 213949129 = 20689^2 + 14627^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6419789 + ... + 6419888.

Almost surely, 2^641983850 is an apocalyptic number.

641983850 is a deficient number, since it is larger than the sum of its proper divisors (552106204).

641983850 is a wasteful number, since it uses less digits than its factorization.

641983850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12839689 (or 12839684 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 641983850 is about 25337.4002218065. The cubic root of 641983850 is about 862.6633898958.

The spelling of 641983850 in words is "six hundred forty-one million, nine hundred eighty-three thousand, eight hundred fifty".