641164112 has 40 divisors (see below), whose sum is σ = 1320922152. Its totient is φ = 300441600.

The previous prime is 641164093. The next prime is 641164159. The reversal of 641164112 is 211461146.

It can be written as a sum of positive squares in 4 ways, for example, as 227285776 + 413878336 = 15076^2 + 20344^2 .

It is a super-2 number, since 2×641164112² = 822182837033497088, which contains 22 as substring.

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, 60662 + ... + 70442.

Almost surely, 2^641164112 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 641164112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660461076).

641164112 is an abundant number, since it is smaller than the sum of its proper divisors (679758040).

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

641164112 is a wasteful number, since it uses less digits than its factorization.

641164112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10047 (or 10041 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 641164112 is about 25321.2186120653. The cubic root of 641164112 is about 862.2960602185.

The spelling of 641164112 in words is "six hundred forty-one million, one hundred sixty-four thousand, one hundred twelve".