85911765 has 16 divisors (see below), whose sum is σ = 138511296. Its totient is φ = 45468800.

The previous prime is 85911751. The next prime is 85911773. The reversal of 85911765 is 56711958.

It is not a de Polignac number, because 85911765 - 2⁵ = 85911733 is a prime.

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, 19896 + ... + 23825.

It is an arithmetic number, because the mean of its divisors is an integer number (8656956).

Almost surely, 2^85911765 is an apocalyptic number.

It is an amenable number.

85911765 is a deficient number, since it is larger than the sum of its proper divisors (52599531).

85911765 is a wasteful number, since it uses less digits than its factorization.

85911765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43860.

The product of its digits is 75600, while the sum is 42.

The square root of 85911765 is about 9268.8599622607. The cubic root of 85911765 is about 441.2494873291.

The spelling of 85911765 in words is "eighty-five million, nine hundred eleven thousand, seven hundred sixty-five".