85911540005 has 4 divisors (see below), whose sum is σ = 103093848012. Its totient is φ = 68729232000.

The previous prime is 85911539999. The next prime is 85911540041. The reversal of 85911540005 is 50004511958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50004511958 = 2 ⋅25002255979.

It can be written as a sum of positive squares in 2 ways, for example, as 29495314564 + 56416225441 = 171742^2 + 237521^2 .

It is not a de Polignac number, because 85911540005 - 2⁶ = 85911539941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8591153996 + ... + 8591154005.

It is an arithmetic number, because the mean of its divisors is an integer number (25773462003).

Almost surely, 2^85911540005 is an apocalyptic number.

It is an amenable number.

85911540005 is a deficient number, since it is larger than the sum of its proper divisors (17182308007).

85911540005 is a wasteful number, since it uses less digits than its factorization.

85911540005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17182308006.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 85911540005 in words is "eighty-five billion, nine hundred eleven million, five hundred forty thousand, five".