641819852 has 12 divisors (see below), whose sum is σ = 1134306096. Its totient is φ = 317732400.

The previous prime is 641819837. The next prime is 641819891. The reversal of 641819852 is 258918146.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793928 + ... + 794735.

It is an arithmetic number, because the mean of its divisors is an integer number (94525508).

Almost surely, 2^641819852 is an apocalyptic number.

It is an amenable number.

641819852 is a deficient number, since it is larger than the sum of its proper divisors (492486244).

641819852 is a wasteful number, since it uses less digits than its factorization.

641819852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588768 (or 1588766 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 641819852 is about 25334.1637320043. The cubic root of 641819852 is about 862.5899264075.

The spelling of 641819852 in words is "six hundred forty-one million, eight hundred nineteen thousand, eight hundred fifty-two".