85531320391589 has 16 divisors (see below), whose sum is σ = 87545570770944. Its totient is φ = 83518217218800.

The previous prime is 85531320391579. The next prime is 85531320391631. The reversal of 85531320391589 is 98519302313558.

It is a cyclic number.

It is not a de Polignac number, because 85531320391589 - 2⁸ = 85531320391333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85531320391549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2665922942 + ... + 2665955024.

It is an arithmetic number, because the mean of its divisors is an integer number (5471598173184).

Almost surely, 2^{85531320391589} is an apocalyptic number.

It is an amenable number.

85531320391589 is a deficient number, since it is larger than the sum of its proper divisors (2014250379355).

85531320391589 is a wasteful number, since it uses less digits than its factorization.

85531320391589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48008.

The product of its (nonzero) digits is 34992000, while the sum is 62.

The spelling of 85531320391589 in words is "eighty-five trillion, five hundred thirty-one billion, three hundred twenty million, three hundred ninety-one thousand, five hundred eighty-nine".