85665172835 has 12 divisors (see below), whose sum is σ = 112993071744. Its totient is φ = 62301943440.

The previous prime is 85665172829. The next prime is 85665172837. The reversal of 85665172835 is 53827156658.

It is a happy number.

It is not a de Polignac number, because 85665172835 - 2⁶ = 85665172771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85665172837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70797059 + ... + 70798268.

It is an arithmetic number, because the mean of its divisors is an integer number (9416089312).

Almost surely, 2^85665172835 is an apocalyptic number.

85665172835 is a deficient number, since it is larger than the sum of its proper divisors (27327898909).

85665172835 is a wasteful number, since it uses less digits than its factorization.

85665172835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141595354 (or 141595343 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 56.

The spelling of 85665172835 in words is "eighty-five billion, six hundred sixty-five million, one hundred seventy-two thousand, eight hundred thirty-five".