64181712 has 80 divisors (see below), whose sum is σ = 192384512. Its totient is φ = 18057600.

The previous prime is 64181701. The next prime is 64181723. The reversal of 64181712 is 21718146.

It is an interprime number because it is at equal distance from previous prime (64181701) and next prime (64181723).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64181712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21087 + ... + 23937.

Almost surely, 2^64181712 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 64181712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96192256).

64181712 is an abundant number, since it is smaller than the sum of its proper divisors (128202800).

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

64181712 is a wasteful number, since it uses less digits than its factorization.

64181712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936 (or 2930 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 64181712 is about 8011.3489500833. The cubic root of 64181712 is about 400.3782089489.

Adding to 64181712 its reverse (21718146), we get a palindrome (85899858).

The spelling of 64181712 in words is "sixty-four million, one hundred eighty-one thousand, seven hundred twelve".