85169439369 has 24 divisors (see below), whose sum is σ = 146710092672. Its totient is φ = 46552239360.

The previous prime is 85169439361. The next prime is 85169439379. The reversal of 85169439369 is 96393496158.

85169439369 is a `hidden beast` number, since 8 + 5 + 169 + 439 + 36 + 9 = 666.

It is not a de Polignac number, because 85169439369 - 2³ = 85169439361 is a prime.

It is a super-2 number, since 2×85169439369² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (85169439361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29387592 + ... + 29390489.

It is an arithmetic number, because the mean of its divisors is an integer number (6112920528).

Almost surely, 2^85169439369 is an apocalyptic number.

It is an amenable number.

85169439369 is a deficient number, since it is larger than the sum of its proper divisors (61540653303).

85169439369 is a wasteful number, since it uses less digits than its factorization.

85169439369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58778117 (or 58778114 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 63.

The spelling of 85169439369 in words is "eighty-five billion, one hundred sixty-nine million, four hundred thirty-nine thousand, three hundred sixty-nine".