64505218 has 16 divisors (see below), whose sum is σ = 99447264. Its totient is φ = 31361440.

The previous prime is 64505183. The next prime is 64505227. The reversal of 64505218 is 81250546.

It is a self number, because there is not a number n which added to its sum of digits gives 64505218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27321 + ... + 29587.

It is an arithmetic number, because the mean of its divisors is an integer number (6215454).

Almost surely, 2^64505218 is an apocalyptic number.

64505218 is a deficient number, since it is larger than the sum of its proper divisors (34942046).

64505218 is a wasteful number, since it uses less digits than its factorization.

64505218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657.

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

The square root of 64505218 is about 8031.5140540249. The cubic root of 64505218 is about 401.0497799947.

The spelling of 64505218 in words is "sixty-four million, five hundred five thousand, two hundred eighteen".