64216180 has 48 divisors (see below), whose sum is σ = 154869120. Its totient is φ = 21909888.

The previous prime is 64216133. The next prime is 64216189. The reversal of 64216180 is 8161246.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64216189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31059 + ... + 33061.

It is an arithmetic number, because the mean of its divisors is an integer number (3226440).

Almost surely, 2^64216180 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 64216180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77434560).

64216180 is an abundant number, since it is smaller than the sum of its proper divisors (90652940).

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

64216180 is a wasteful number, since it uses less digits than its factorization.

64216180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 64216180 is about 8013.4998596119. The cubic root of 64216180 is about 400.4498688554.

The spelling of 64216180 in words is "sixty-four million, two hundred sixteen thousand, one hundred eighty".