85855506969 has 4 divisors (see below), whose sum is σ = 114474009296. Its totient is φ = 57237004644.

The previous prime is 85855506949. The next prime is 85855507007. The reversal of 85855506969 is 96960555858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85855506969 - 2¹¹ = 85855504921 is a prime.

It is a super-2 number, since 2×85855506969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85855506949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14309251159 + ... + 14309251164.

It is an arithmetic number, because the mean of its divisors is an integer number (28618502324).

Almost surely, 2^85855506969 is an apocalyptic number.

It is an amenable number.

85855506969 is a deficient number, since it is larger than the sum of its proper divisors (28618502327).

85855506969 is a wasteful number, since it uses less digits than its factorization.

85855506969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28618502326.

The product of its (nonzero) digits is 116640000, while the sum is 66.

The spelling of 85855506969 in words is "eighty-five billion, eight hundred fifty-five million, five hundred six thousand, nine hundred sixty-nine".