85444186681 has 16 divisors (see below), whose sum is σ = 98517888000. Its totient is φ = 72589100688.

The previous prime is 85444186637. The next prime is 85444186699. The reversal of 85444186681 is 18668144458.

It is a cyclic number.

It is not a de Polignac number, because 85444186681 - 2²⁵ = 85410632249 is a prime.

It is a super-2 number, since 2×85444186681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85444186381) 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, 509526 + ... + 656128.

It is an arithmetic number, because the mean of its divisors is an integer number (6157368000).

Almost surely, 2^85444186681 is an apocalyptic number.

It is an amenable number.

85444186681 is a deficient number, since it is larger than the sum of its proper divisors (13073701319).

85444186681 is a wasteful number, since it uses less digits than its factorization.

85444186681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147348.

The product of its digits is 5898240, while the sum is 55.

The spelling of 85444186681 in words is "eighty-five billion, four hundred forty-four million, one hundred eighty-six thousand, six hundred eighty-one".