85856807017 has 4 divisors (see below), whose sum is σ = 86048025300. Its totient is φ = 85665588736.

The previous prime is 85856807009. The next prime is 85856807041. The reversal of 85856807017 is 71070865858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38439131481 + 47417675536 = 196059^2 + 217756^2 .

It is a cyclic number.

It is not a de Polignac number, because 85856807017 - 2³ = 85856807009 is a prime.

It is a super-2 number, since 2×85856807017² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85856807117) 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 3 ways as a sum of consecutive naturals, for example, 95608468 + ... + 95609365.

It is an arithmetic number, because the mean of its divisors is an integer number (21512006325).

Almost surely, 2^85856807017 is an apocalyptic number.

It is an amenable number.

85856807017 is a deficient number, since it is larger than the sum of its proper divisors (191218283).

85856807017 is a wasteful number, since it uses less digits than its factorization.

85856807017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191218282.

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 85856807017 in words is "eighty-five billion, eight hundred fifty-six million, eight hundred seven thousand, seventeen".