64218055 has 16 divisors (see below), whose sum is σ = 85449888. Its totient is φ = 45936000.

The previous prime is 64218053. The next prime is 64218059. The reversal of 64218055 is 55081246.

It is not a de Polignac number, because 64218055 - 2¹ = 64218053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64218053) 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 15 ways as a sum of consecutive naturals, for example, 6216 + ... + 12925.

It is an arithmetic number, because the mean of its divisors is an integer number (5340618).

Almost surely, 2^64218055 is an apocalyptic number.

64218055 is a deficient number, since it is larger than the sum of its proper divisors (21231833).

64218055 is a wasteful number, since it uses less digits than its factorization.

64218055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19218.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 64218055 is about 8013.6168488392. The cubic root of 64218055 is about 400.4537662957.

The spelling of 64218055 in words is "sixty-four million, two hundred eighteen thousand, fifty-five".