64518367 has 4 divisors (see below), whose sum is σ = 65089440. Its totient is φ = 63947296.

The previous prime is 64518323. The next prime is 64518397. The reversal of 64518367 is 76381546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76381546 = 2 ⋅38190773.

It is a cyclic number.

It is not a de Polignac number, because 64518367 - 2⁷ = 64518239 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64518397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285367 + ... + 285592.

It is an arithmetic number, because the mean of its divisors is an integer number (16272360).

Almost surely, 2^64518367 is an apocalyptic number.

64518367 is a deficient number, since it is larger than the sum of its proper divisors (571073).

64518367 is a wasteful number, since it uses less digits than its factorization.

64518367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571072.

The product of its digits is 120960, while the sum is 40.

The square root of 64518367 is about 8032.3326001853. The cubic root of 64518367 is about 401.0770286703.

The spelling of 64518367 in words is "sixty-four million, five hundred eighteen thousand, three hundred sixty-seven".