641689472 has 16 divisors (see below), whose sum is σ = 1278366000. Its totient is φ = 320844672.

The previous prime is 641689459. The next prime is 641689481. The reversal of 641689472 is 274986146.

641689472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2506472 + ... + 2506727.

It is an arithmetic number, because the mean of its divisors is an integer number (79897875).

Almost surely, 2^641689472 is an apocalyptic number.

It is an amenable number.

641689472 is a deficient number, since it is larger than the sum of its proper divisors (636676528).

641689472 is an equidigital number, since it uses as much as digits as its factorization.

641689472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013213 (or 5013201 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 641689472 is about 25331.5903961832. The cubic root of 641689472 is about 862.5315132923.

The spelling of 641689472 in words is "six hundred forty-one million, six hundred eighty-nine thousand, four hundred seventy-two".