85813491169 has 16 divisors (see below), whose sum is σ = 98819312256. Its totient is φ = 72996480000.

The previous prime is 85813491151. The next prime is 85813491217. The reversal of 85813491169 is 96119431858.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85813491169 - 2⁹ = 85813490657 is a prime.

It is a super-2 number, since 2×85813491169² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85813401169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398529 + ... + 574849.

It is an arithmetic number, because the mean of its divisors is an integer number (6176207016).

Almost surely, 2^85813491169 is an apocalyptic number.

It is an amenable number.

85813491169 is a deficient number, since it is larger than the sum of its proper divisors (13005821087).

85813491169 is a wasteful number, since it uses less digits than its factorization.

85813491169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176856.

The product of its digits is 1866240, while the sum is 55.

The spelling of 85813491169 in words is "eighty-five billion, eight hundred thirteen million, four hundred ninety-one thousand, one hundred sixty-nine".