85186183961 has 4 divisors (see below), whose sum is σ = 85204480692. Its totient is φ = 85167887232.

The previous prime is 85186183909. The next prime is 85186183969. The reversal of 85186183961 is 16938168158.

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 9871614736 + 75314569225 = 99356^2 + 274435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85186183961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85186183897 and 85186183906.

It is not an unprimeable number, because it can be changed into a prime (85186183969) 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, 9141380 + ... + 9150693.

It is an arithmetic number, because the mean of its divisors is an integer number (21301120173).

Almost surely, 2^85186183961 is an apocalyptic number.

It is an amenable number.

85186183961 is a deficient number, since it is larger than the sum of its proper divisors (18296731).

85186183961 is a wasteful number, since it uses less digits than its factorization.

85186183961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18296730.

The product of its digits is 2488320, while the sum is 56.

The spelling of 85186183961 in words is "eighty-five billion, one hundred eighty-six million, one hundred eighty-three thousand, nine hundred sixty-one".