85685875531 has 16 divisors (see below), whose sum is σ = 88996497408. Its totient is φ = 82410278400.

The previous prime is 85685875493. The next prime is 85685875571. The reversal of 85685875531 is 13557858658.

It is a cyclic number.

It is not a de Polignac number, because 85685875531 - 2⁷ = 85685875403 is a prime.

It is a super-2 number, since 2×85685875531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85685875531.

It is not an unprimeable number, because it can be changed into a prime (85685875571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6520890 + ... + 6534016.

It is an arithmetic number, because the mean of its divisors is an integer number (5562281088).

Almost surely, 2^85685875531 is an apocalyptic number.

85685875531 is a deficient number, since it is larger than the sum of its proper divisors (3310621877).

85685875531 is a wasteful number, since it uses less digits than its factorization.

85685875531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14442.

The product of its digits is 40320000, while the sum is 61.

The spelling of 85685875531 in words is "eighty-five billion, six hundred eighty-five million, eight hundred seventy-five thousand, five hundred thirty-one".