87159796181 has 2 divisors, whose sum is σ = 87159796182. Its totient is φ = 87159796180.

The previous prime is 87159796169. The next prime is 87159796187. The reversal of 87159796181 is 18169795178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63317656900 + 23842139281 = 251630^2 + 154409^2 .

It is a cyclic number.

It is not a de Polignac number, because 87159796181 - 2¹⁰ = 87159795157 is a prime.

It is a super-2 number, since 2×87159796181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87159796187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43579898090 + 43579898091.

It is an arithmetic number, because the mean of its divisors is an integer number (43579898091).

Almost surely, 2^87159796181 is an apocalyptic number.

It is an amenable number.

87159796181 is a deficient number, since it is larger than the sum of its proper divisors (1).

87159796181 is an equidigital number, since it uses as much as digits as its factorization.

87159796181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 62.

The spelling of 87159796181 in words is "eighty-seven billion, one hundred fifty-nine million, seven hundred ninety-six thousand, one hundred eighty-one".