64418447 has 4 divisors (see below), whose sum is σ = 64556856. Its totient is φ = 64280040.

The previous prime is 64418437. The next prime is 64418449. The reversal of 64418447 is 74481446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64418447 - 2⁸ = 64418191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64418447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64418449) 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, 68504 + ... + 69437.

It is an arithmetic number, because the mean of its divisors is an integer number (16139214).

Almost surely, 2^64418447 is an apocalyptic number.

64418447 is a deficient number, since it is larger than the sum of its proper divisors (138409).

64418447 is a wasteful number, since it uses less digits than its factorization.

64418447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138408.

The product of its digits is 86016, while the sum is 38.

The square root of 64418447 is about 8026.1103281727. The cubic root of 64418447 is about 400.8698715209.

It can be divided in two parts, 644 and 18447, that added together give a palindrome (19091).

The spelling of 64418447 in words is "sixty-four million, four hundred eighteen thousand, four hundred forty-seven".