158388424021 has 2 divisors, whose sum is σ = 158388424022. Its totient is φ = 158388424020.

The previous prime is 158388423953. The next prime is 158388424063. The reversal of 158388424021 is 120424883851.

158388424021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80153536996 + 78234887025 = 283114^2 + 279705^2 .

It is an emirp because it is prime and its reverse (120424883851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158388424021 - 2¹¹ = 158388421973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158388424081) 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, 79194212010 + 79194212011.

It is an arithmetic number, because the mean of its divisors is an integer number (79194212011).

Almost surely, 2^158388424021 is an apocalyptic number.

It is an amenable number.

158388424021 is a deficient number, since it is larger than the sum of its proper divisors (1).

158388424021 is an equidigital number, since it uses as much as digits as its factorization.

158388424021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 491520, while the sum is 46.

The spelling of 158388424021 in words is "one hundred fifty-eight billion, three hundred eighty-eight million, four hundred twenty-four thousand, twenty-one".