85644532271 has 8 divisors (see below), whose sum is σ = 92894213664. Its totient is φ = 78640602880.

The previous prime is 85644532151. The next prime is 85644532273. The reversal of 85644532271 is 17223544658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85644532271 - 2²² = 85640337967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85644532273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61437275 + ... + 61438668.

It is an arithmetic number, because the mean of its divisors is an integer number (11611776708).

Almost surely, 2^85644532271 is an apocalyptic number.

85644532271 is a deficient number, since it is larger than the sum of its proper divisors (7249681393).

85644532271 is a wasteful number, since it uses less digits than its factorization.

85644532271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122876001.

The product of its digits is 1612800, while the sum is 47.

The spelling of 85644532271 in words is "eighty-five billion, six hundred forty-four million, five hundred thirty-two thousand, two hundred seventy-one".