85054085991 has 16 divisors (see below), whose sum is σ = 144006918400. Its totient is φ = 48602334744.

The previous prime is 85054085989. The next prime is 85054085999. The reversal of 85054085991 is 19958045058.

85054085991 is a `hidden beast` number, since 8 + 5 + 0 + 5 + 40 + 8 + 599 + 1 = 666.

It is not a de Polignac number, because 85054085991 - 2¹ = 85054085989 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 (85054085999) 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 15 ways as a sum of consecutive naturals, for example, 225010621 + ... + 225010998.

It is an arithmetic number, because the mean of its divisors is an integer number (9000432400).

Almost surely, 2^85054085991 is an apocalyptic number.

85054085991 is a deficient number, since it is larger than the sum of its proper divisors (58952832409).

85054085991 is a wasteful number, since it uses less digits than its factorization.

85054085991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450021635 (or 450021629 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The spelling of 85054085991 in words is "eighty-five billion, fifty-four million, eighty-five thousand, nine hundred ninety-one".