64172218 has 8 divisors (see below), whose sum is σ = 105009120. Its totient is φ = 29169180.

The previous prime is 64172203. The next prime is 64172221. The reversal of 64172218 is 81227146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64172218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1458438 + ... + 1458481.

It is an arithmetic number, because the mean of its divisors is an integer number (13126140).

Almost surely, 2^64172218 is an apocalyptic number.

64172218 is a deficient number, since it is larger than the sum of its proper divisors (40836902).

64172218 is a wasteful number, since it uses less digits than its factorization.

64172218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916932.

The product of its digits is 5376, while the sum is 31.

The square root of 64172218 is about 8010.7563937496. The cubic root of 64172218 is about 400.3584661591.

The spelling of 64172218 in words is "sixty-four million, one hundred seventy-two thousand, two hundred eighteen".