85804808172765 has 32 divisors (see below), whose sum is σ = 149828856782976. Its totient is φ = 41585535586560.

The previous prime is 85804808172701. The next prime is 85804808172857. The reversal of 85804808172765 is 56727180840858.

It is not a de Polignac number, because 85804808172765 - 2⁶ = 85804808172701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85804808172765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104562862 + ... + 105380271.

It is an arithmetic number, because the mean of its divisors is an integer number (4682151774468).

Almost surely, 2^{85804808172765} is an apocalyptic number.

It is an amenable number.

85804808172765 is a deficient number, since it is larger than the sum of its proper divisors (64024048610211).

85804808172765 is a wasteful number, since it uses less digits than its factorization.

85804808172765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209945629.

The product of its (nonzero) digits is 240844800, while the sum is 69.

The spelling of 85804808172765 in words is "eighty-five trillion, eight hundred four billion, eight hundred eight million, one hundred seventy-two thousand, seven hundred sixty-five".