85865508221185 has 32 divisors (see below), whose sum is σ = 136020410894592. Its totient is φ = 50377929953280.

The previous prime is 85865508221183. The next prime is 85865508221209. The reversal of 85865508221185 is 58112280556858.

It is not a de Polignac number, because 85865508221185 - 2¹ = 85865508221183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85865508221183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6559619752 + ... + 6559632841.

It is an arithmetic number, because the mean of its divisors is an integer number (4250637840456).

Almost surely, 2^{85865508221185} is an apocalyptic number.

85865508221185 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85865508221185 is a deficient number, since it is larger than the sum of its proper divisors (50154902673407).

85865508221185 is a wasteful number, since it uses less digits than its factorization.

85865508221185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13119252633.

The product of its (nonzero) digits is 61440000, while the sum is 64.

The spelling of 85865508221185 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred eight million, two hundred twenty-one thousand, one hundred eighty-five".