85144044159 has 28 divisors (see below), whose sum is σ = 127745030800. Its totient is φ = 56723851584.

The previous prime is 85144044133. The next prime is 85144044163. The reversal of 85144044159 is 95144044158.

85144044159 is a `hidden beast` number, since 8 + 51 + 440 + 4 + 4 + 159 = 666.

It is not a de Polignac number, because 85144044159 - 2⁵ = 85144044127 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 (85142044159) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1046262 + ... + 1124700.

Almost surely, 2^85144044159 is an apocalyptic number.

85144044159 is a deficient number, since it is larger than the sum of its proper divisors (42600986641).

85144044159 is an equidigital number, since it uses as much as digits as its factorization.

85144044159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79946 (or 79931 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

Subtracting 85144044159 from its reverse (95144044158), we obtain a palindrome (9999999999).

The spelling of 85144044159 in words is "eighty-five billion, one hundred forty-four million, forty-four thousand, one hundred fifty-nine".