85156704839 has 4 divisors (see below), whose sum is σ = 86356095120. Its totient is φ = 83957314560.

The previous prime is 85156704803. The next prime is 85156704847. The reversal of 85156704839 is 93840765158.

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

It is a cyclic number.

It is not a de Polignac number, because 85156704839 - 2³⁶ = 16437228103 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 (85156704859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599695034 + ... + 599695175.

It is an arithmetic number, because the mean of its divisors is an integer number (21589023780).

Almost surely, 2^85156704839 is an apocalyptic number.

85156704839 is a deficient number, since it is larger than the sum of its proper divisors (1199390281).

85156704839 is a wasteful number, since it uses less digits than its factorization.

85156704839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199390280.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 85156704839 in words is "eighty-five billion, one hundred fifty-six million, seven hundred four thousand, eight hundred thirty-nine".