85644168554 has 16 divisors (see below), whose sum is σ = 147427786176. Its totient is φ = 36552340800.

The previous prime is 85644168551. The next prime is 85644168667. The reversal of 85644168554 is 45586144658.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85644168554.

It is not an unprimeable number, because it can be changed into a prime (85644168551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12688412 + ... + 12695159.

It is an arithmetic number, because the mean of its divisors is an integer number (9214236636).

Almost surely, 2^85644168554 is an apocalyptic number.

85644168554 is a deficient number, since it is larger than the sum of its proper divisors (61783617622).

85644168554 is a wasteful number, since it uses less digits than its factorization.

85644168554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25383821.

The product of its digits is 18432000, while the sum is 56.

The spelling of 85644168554 in words is "eighty-five billion, six hundred forty-four million, one hundred sixty-eight thousand, five hundred fifty-four".