64181852 has 24 divisors (see below), whose sum is σ = 130542720. Its totient is φ = 27039600.

The previous prime is 64181849. The next prime is 64181857. The reversal of 64181852 is 25818146.

It is a super-2 number, since 2×64181852² = 8238620252299808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64181857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17774 + ... + 21077.

It is an arithmetic number, because the mean of its divisors is an integer number (5439280).

Almost surely, 2^64181852 is an apocalyptic number.

It is an amenable number.

64181852 is an abundant number, since it is smaller than the sum of its proper divisors (66360868).

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

64181852 is a wasteful number, since it uses less digits than its factorization.

64181852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38921 (or 38919 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 64181852 is about 8011.3576876832. The cubic root of 64181852 is about 400.3785000646.

Adding to 64181852 its reverse (25818146), we get a palindrome (89999998).

The spelling of 64181852 in words is "sixty-four million, one hundred eighty-one thousand, eight hundred fifty-two".