85641512143 has 4 divisors (see below), whose sum is σ = 93427104168. Its totient is φ = 77855920120.

The previous prime is 85641512141. The next prime is 85641512213. The reversal of 85641512143 is 34121514658.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85641512143 - 2¹ = 85641512141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85641512096 and 85641512105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85641512141) 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 3 ways as a sum of consecutive naturals, for example, 3892795996 + ... + 3892796017.

It is an arithmetic number, because the mean of its divisors is an integer number (23356776042).

Almost surely, 2^85641512143 is an apocalyptic number.

85641512143 is a deficient number, since it is larger than the sum of its proper divisors (7785592025).

85641512143 is a wasteful number, since it uses less digits than its factorization.

85641512143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7785592024.

The product of its digits is 115200, while the sum is 40.

The spelling of 85641512143 in words is "eighty-five billion, six hundred forty-one million, five hundred twelve thousand, one hundred forty-three".