641019872 has 24 divisors (see below), whose sum is σ = 1328430600. Its totient is φ = 303640704.

The previous prime is 641019859. The next prime is 641019889. The reversal of 641019872 is 278910146.

641019872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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, 526547 + ... + 527762.

It is an arithmetic number, because the mean of its divisors is an integer number (55351275).

Almost surely, 2^641019872 is an apocalyptic number.

It is an amenable number.

641019872 is an abundant number, since it is smaller than the sum of its proper divisors (687410728).

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

641019872 is a wasteful number, since it uses less digits than its factorization.

641019872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054338 (or 1054330 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 641019872 is about 25318.3702477075. The cubic root of 641019872 is about 862.2313929934.

The spelling of 641019872 in words is "six hundred forty-one million, nineteen thousand, eight hundred seventy-two".