85389311285 has 4 divisors (see below), whose sum is σ = 102467173548. Its totient is φ = 68311449024.

The previous prime is 85389311281. The next prime is 85389311333. The reversal of 85389311285 is 58211398358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58211398358 = 2 ⋅29105699179.

It can be written as a sum of positive squares in 2 ways, for example, as 27953833636 + 57435477649 = 167194^2 + 239657^2 .

It is a cyclic number.

It is not a de Polignac number, because 85389311285 - 2² = 85389311281 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 (85389311281) 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, 8538931124 + ... + 8538931133.

It is an arithmetic number, because the mean of its divisors is an integer number (25616793387).

Almost surely, 2^85389311285 is an apocalyptic number.

It is an amenable number.

85389311285 is a deficient number, since it is larger than the sum of its proper divisors (17077862263).

85389311285 is a wasteful number, since it uses less digits than its factorization.

85389311285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17077862262.

The product of its digits is 2073600, while the sum is 53.

The spelling of 85389311285 in words is "eighty-five billion, three hundred eighty-nine million, three hundred eleven thousand, two hundred eighty-five".