85721585718 has 32 divisors (see below), whose sum is σ = 183732293376. Its totient is φ = 26592828768.

The previous prime is 85721585683. The next prime is 85721585731. The reversal of 85721585718 is 81758512758.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8389096 + ... + 8399307.

It is an arithmetic number, because the mean of its divisors is an integer number (5741634168).

Almost surely, 2^85721585718 is an apocalyptic number.

85721585718 is an abundant number, since it is smaller than the sum of its proper divisors (98010707658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85721585718 is a wasteful number, since it uses less digits than its factorization.

85721585718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16788468.

The product of its digits is 6272000, while the sum is 57.

The spelling of 85721585718 in words is "eighty-five billion, seven hundred twenty-one million, five hundred eighty-five thousand, seven hundred eighteen".