641989596 has 24 divisors (see below), whose sum is σ = 1504581120. Its totient is φ = 213052912.

The previous prime is 641989589. The next prime is 641989609. The reversal of 641989596 is 695989146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115116 + ... + 120563.

It is an arithmetic number, because the mean of its divisors is an integer number (62690880).

Almost surely, 2^641989596 is an apocalyptic number.

It is an amenable number.

641989596 is an abundant number, since it is smaller than the sum of its proper divisors (862591524).

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

641989596 is a wasteful number, since it uses less digits than its factorization.

641989596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235913 (or 235911 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 57.

The square root of 641989596 is about 25337.5136112445. The cubic root of 641989596 is about 862.6659636101.

The spelling of 641989596 in words is "six hundred forty-one million, nine hundred eighty-nine thousand, five hundred ninety-six".