641889850 has 72 divisors (see below), whose sum is σ = 1399847904. Its totient is φ = 214512000.

The previous prime is 641889841. The next prime is 641889881. The reversal of 641889850 is 58988146.

It is a junction number, because it is equal to n+sod(n) for n = 641889794 and 641889803.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 587805 + ... + 588895.

It is an arithmetic number, because the mean of its divisors is an integer number (19442332).

Almost surely, 2^641889850 is an apocalyptic number.

641889850 is an abundant number, since it is smaller than the sum of its proper divisors (757958054).

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

641889850 is a wasteful number, since it uses less digits than its factorization.

641889850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 641889850 is about 25335.5451885291. The cubic root of 641889850 is about 862.6212837916.

The spelling of 641889850 in words is "six hundred forty-one million, eight hundred eighty-nine thousand, eight hundred fifty".