85644718 has 4 divisors (see below), whose sum is σ = 128467080. Its totient is φ = 42822358.

The previous prime is 85644701. The next prime is 85644719. The reversal of 85644718 is 81744658.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85644719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21411178 + ... + 21411181.

It is an arithmetic number, because the mean of its divisors is an integer number (32116770).

Almost surely, 2^85644718 is an apocalyptic number.

85644718 is a deficient number, since it is larger than the sum of its proper divisors (42822362).

85644718 is a wasteful number, since it uses less digits than its factorization.

85644718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42822361.

The product of its digits is 215040, while the sum is 43.

The square root of 85644718 is about 9254.4431491041. The cubic root of 85644718 is about 440.7918214332.

The spelling of 85644718 in words is "eighty-five million, six hundred forty-four thousand, seven hundred eighteen".