85231809860 has 12 divisors (see below), whose sum is σ = 178986800748. Its totient is φ = 34092723936.

The previous prime is 85231809853. The next prime is 85231809877. The reversal of 85231809860 is 6890813258.

It can be written as a sum of positive squares in 2 ways, for example, as 43420557376 + 41811252484 = 208376^2 + 204478^2 .

It is a super-2 number, since 2×85231809860² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 85231809799 and 85231809808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130795227 + ... + 2130795266.

It is an arithmetic number, because the mean of its divisors is an integer number (14915566729).

Almost surely, 2^85231809860 is an apocalyptic number.

It is an amenable number.

85231809860 is an abundant number, since it is smaller than the sum of its proper divisors (93754990888).

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

85231809860 is a wasteful number, since it uses less digits than its factorization.

85231809860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261590502 (or 4261590500 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 85231809860 in words is "eighty-five billion, two hundred thirty-one million, eight hundred nine thousand, eight hundred sixty".