85805765 has 16 divisors (see below), whose sum is σ = 105356160. Its totient is φ = 67066560.

The previous prime is 85805723. The next prime is 85805777. The reversal of 85805765 is 56750858.

It is not a de Polignac number, because 85805765 - 2⁸ = 85805509 is a prime.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 52592 + ... + 54198.

It is an arithmetic number, because the mean of its divisors is an integer number (6584760).

Almost surely, 2^85805765 is an apocalyptic number.

It is an amenable number.

85805765 is a deficient number, since it is larger than the sum of its proper divisors (19550395).

85805765 is a wasteful number, since it uses less digits than its factorization.

85805765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 85805765 is about 9263.1401263287. The cubic root of 85805765 is about 441.0679379019.

The spelling of 85805765 in words is "eighty-five million, eight hundred five thousand, seven hundred sixty-five".