85736538197 has 4 divisors (see below), whose sum is σ = 85834300236. Its totient is φ = 85638776160.

The previous prime is 85736538193. The next prime is 85736538253. The reversal of 85736538197 is 79183563758.

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 49778518321 + 35958019876 = 223111^2 + 189626^2 .

It is a cyclic number.

It is not a de Polignac number, because 85736538197 - 2² = 85736538193 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 (85736538193) 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, 48879704 + ... + 48881457.

It is an arithmetic number, because the mean of its divisors is an integer number (21458575059).

Almost surely, 2^85736538197 is an apocalyptic number.

It is an amenable number.

85736538197 is a deficient number, since it is larger than the sum of its proper divisors (97762039).

85736538197 is an equidigital number, since it uses as much as digits as its factorization.

85736538197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97762038.

The product of its digits is 38102400, while the sum is 62.

The spelling of 85736538197 in words is "eighty-five billion, seven hundred thirty-six million, five hundred thirty-eight thousand, one hundred ninety-seven".