64800818 has 4 divisors (see below), whose sum is σ = 97201230. Its totient is φ = 32400408.

The previous prime is 64800781. The next prime is 64800829. The reversal of 64800818 is 81800846.

64800818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81800846 = 2 ⋅40900423.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 528529 = 8017^2 + 727^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200203 + ... + 16200206.

Almost surely, 2^64800818 is an apocalyptic number.

64800818 is a deficient number, since it is larger than the sum of its proper divisors (32400412).

64800818 is a wasteful number, since it uses less digits than its factorization.

64800818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32400411.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 64800818 is about 8049.8955272724. The cubic root of 64800818 is about 401.6614601538.

The spelling of 64800818 in words is "sixty-four million, eight hundred thousand, eight hundred eighteen".