158187320881 has 2 divisors, whose sum is σ = 158187320882. Its totient is φ = 158187320880.

The previous prime is 158187320867. The next prime is 158187320917. The reversal of 158187320881 is 188023781851.

158187320881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158018970256 + 168350625 = 397516^2 + 12975^2 .

It is a cyclic number.

It is not a de Polignac number, because 158187320881 - 2²³ = 158178932273 is a prime.

It is a super-2 number, since 2×158187320881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (158187320861) 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 as a sum of consecutive naturals, namely, 79093660440 + 79093660441.

It is an arithmetic number, because the mean of its divisors is an integer number (79093660441).

Almost surely, 2^158187320881 is an apocalyptic number.

It is an amenable number.

158187320881 is a deficient number, since it is larger than the sum of its proper divisors (1).

158187320881 is an equidigital number, since it uses as much as digits as its factorization.

158187320881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 860160, while the sum is 52.

The spelling of 158187320881 in words is "one hundred fifty-eight billion, one hundred eighty-seven million, three hundred twenty thousand, eight hundred eighty-one".