64181120 has 96 divisors (see below), whose sum is σ = 163459080. Its totient is φ = 24092672.

The previous prime is 64181111. The next prime is 64181141. The reversal of 64181120 is 2118146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184787 + ... + 185133.

Almost surely, 2^64181120 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 64181120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81729540).

64181120 is an abundant number, since it is smaller than the sum of its proper divisors (99277960).

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

64181120 is a wasteful number, since it uses less digits than its factorization.

64181120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 64181120 is about 8011.3120024126. The cubic root of 64181120 is about 400.3769779408.

Adding to 64181120 its reverse (2118146), we get a palindrome (66299266).

The spelling of 64181120 in words is "sixty-four million, one hundred eighty-one thousand, one hundred twenty".