641662326 has 48 divisors (see below), whose sum is σ = 1455199200. Its totient is φ = 203955840.

The previous prime is 641662291. The next prime is 641662327. The reversal of 641662326 is 623266146.

641662326 is a `hidden beast` number, since 6 + 4 + 1 + 6 + 623 + 26 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641662327) 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, 142266 + ... + 146706.

It is an arithmetic number, because the mean of its divisors is an integer number (30316650).

Almost surely, 2^641662326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641662326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727599600).

641662326 is an abundant number, since it is smaller than the sum of its proper divisors (813536874).

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

641662326 is a wasteful number, since it uses less digits than its factorization.

641662326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821 (or 4818 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 641662326 is about 25331.0545773365. The cubic root of 641662326 is about 862.5193502905.

The spelling of 641662326 in words is "six hundred forty-one million, six hundred sixty-two thousand, three hundred twenty-six".