85518418 has 4 divisors (see below), whose sum is σ = 128277630. Its totient is φ = 42759208.

The previous prime is 85518403. The next prime is 85518421. The reversal of 85518418 is 81481558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81481558 = 2 ⋅40740779.

It can be written as a sum of positive squares in only one way, i.e., 85322169 + 196249 = 9237^2 + 443^2 .

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 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 as a sum of consecutive naturals, namely, 21379603 + ... + 21379606.

Almost surely, 2^85518418 is an apocalyptic number.

85518418 is a deficient number, since it is larger than the sum of its proper divisors (42759212).

85518418 is a wasteful number, since it uses less digits than its factorization.

85518418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42759211.

The product of its digits is 51200, while the sum is 40.

The square root of 85518418 is about 9247.6168822027. The cubic root of 85518418 is about 440.5750367237.

The spelling of 85518418 in words is "eighty-five million, five hundred eighteen thousand, four hundred eighteen".