641659932 has 72 divisors (see below), whose sum is σ = 1670532864. Its totient is φ = 207549216.

The previous prime is 641659897. The next prime is 641659937. The reversal of 641659932 is 239956146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641659937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251053 + ... + 253595.

Almost surely, 2^641659932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641659932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835266432).

641659932 is an abundant number, since it is smaller than the sum of its proper divisors (1028872932).

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

641659932 is a wasteful number, since it uses less digits than its factorization.

641659932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2754 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 641659932 is about 25331.0073230419. The cubic root of 641659932 is about 862.5182776215.

The spelling of 641659932 in words is "six hundred forty-one million, six hundred fifty-nine thousand, nine hundred thirty-two".