64194169 has 8 divisors (see below), whose sum is σ = 69382152. Its totient is φ = 59041920.

The previous prime is 64194167. The next prime is 64194181. The reversal of 64194169 is 96149146.

It can be written as a sum of positive squares in 4 ways, for example, as 9241600 + 54952569 = 3040^2 + 7413^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64194169 - 2¹ = 64194167 is a prime.

It is a super-2 number, since 2×64194169² = 8241782667201122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64194161) 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, 5134 + ... + 12439.

It is an arithmetic number, because the mean of its divisors is an integer number (8672769).

Almost surely, 2^64194169 is an apocalyptic number.

It is an amenable number.

64194169 is a deficient number, since it is larger than the sum of its proper divisors (5187983).

64194169 is a wasteful number, since it uses less digits than its factorization.

64194169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867.

The product of its digits is 46656, while the sum is 40.

The square root of 64194169 is about 8012.1263719440. The cubic root of 64194169 is about 400.4041103496.

The spelling of 64194169 in words is "sixty-four million, one hundred ninety-four thousand, one hundred sixty-nine".