641223672 has 32 divisors (see below), whose sum is σ = 1611463680. Its totient is φ = 212620640.

The previous prime is 641223637. The next prime is 641223673. The reversal of 641223672 is 276322146.

641223672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641223672² = 822335595066327168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641223673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65358 + ... + 74525.

It is an arithmetic number, because the mean of its divisors is an integer number (50358240).

Almost surely, 2^641223672 is an apocalyptic number.

It is an amenable number.

641223672 is an abundant number, since it is smaller than the sum of its proper divisors (970240008).

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

641223672 is a wasteful number, since it uses less digits than its factorization.

641223672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140083 (or 140079 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 641223672 is about 25322.3946734901. The cubic root of 641223672 is about 862.3227599677.

The spelling of 641223672 in words is "six hundred forty-one million, two hundred twenty-three thousand, six hundred seventy-two".