85169553391 has 8 divisors (see below), whose sum is σ = 91751663024. Its totient is φ = 78591816000.

The previous prime is 85169553389. The next prime is 85169553397. The reversal of 85169553391 is 19335596158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85169553391 - 2¹ = 85169553389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85169553397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052541 + ... + 1130566.

It is an arithmetic number, because the mean of its divisors is an integer number (11468957878).

Almost surely, 2^85169553391 is an apocalyptic number.

85169553391 is a deficient number, since it is larger than the sum of its proper divisors (6582109633).

85169553391 is a wasteful number, since it uses less digits than its factorization.

85169553391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186121.

The product of its digits is 4374000, while the sum is 55.

The spelling of 85169553391 in words is "eighty-five billion, one hundred sixty-nine million, five hundred fifty-three thousand, three hundred ninety-one".