85389197985 has 192 divisors, whose sum is σ = 192356236800. Its totient is φ = 34028273664.

The previous prime is 85389197969. The next prime is 85389198019. The reversal of 85389197985 is 58979198358.

85389197985 is a `hidden beast` number, since 8 + 538 + 9 + 1 + 9 + 7 + 9 + 85 = 666.

It is not a de Polignac number, because 85389197985 - 2⁴ = 85389197969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27463611 + ... + 27466719.

It is an arithmetic number, because the mean of its divisors is an integer number (1001855400).

Almost surely, 2^85389197985 is an apocalyptic number.

It is an amenable number.

85389197985 is an abundant number, since it is smaller than the sum of its proper divisors (106967038815).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85389197985 is a wasteful number, since it uses less digits than its factorization.

85389197985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3509 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 72.

The spelling of 85389197985 in words is "eighty-five billion, three hundred eighty-nine million, one hundred ninety-seven thousand, nine hundred eighty-five".