85510531871 has 8 divisors (see below), whose sum is σ = 90550078080. Its totient is φ = 80524884888.

The previous prime is 85510531859. The next prime is 85510531901. The reversal of 85510531871 is 17813501558.

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 85510531871 - 2³⁰ = 84436790047 is a prime.

It is a super-2 number, since 2×85510531871² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85510531801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13471541 + ... + 13477886.

It is an arithmetic number, because the mean of its divisors is an integer number (11318759760).

Almost surely, 2^85510531871 is an apocalyptic number.

85510531871 is a deficient number, since it is larger than the sum of its proper divisors (5039546209).

85510531871 is a wasteful number, since it uses less digits than its factorization.

85510531871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26949613.

The product of its (nonzero) digits is 168000, while the sum is 44.

The spelling of 85510531871 in words is "eighty-five billion, five hundred ten million, five hundred thirty-one thousand, eight hundred seventy-one".