641589789 has 16 divisors (see below), whose sum is σ = 874012160. Its totient is φ = 418532400.

The previous prime is 641589787. The next prime is 641589829. The reversal of 641589789 is 987985146.

It is not a de Polignac number, because 641589789 - 2¹ = 641589787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641589787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19782 + ... + 40920.

It is an arithmetic number, because the mean of its divisors is an integer number (54625760).

Almost surely, 2^641589789 is an apocalyptic number.

It is an amenable number.

641589789 is a deficient number, since it is larger than the sum of its proper divisors (232422371).

641589789 is a wasteful number, since it uses less digits than its factorization.

641589789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21360.

The product of its digits is 4354560, while the sum is 57.

The square root of 641589789 is about 25329.6227567645. The cubic root of 641589789 is about 862.4868477726.

The spelling of 641589789 in words is "six hundred forty-one million, five hundred eighty-nine thousand, seven hundred eighty-nine".