158662847921 has 2 divisors, whose sum is σ = 158662847922. Its totient is φ = 158662847920.

The previous prime is 158662847909. The next prime is 158662847953. The reversal of 158662847921 is 129748266851.

158662847921 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., 93183667600 + 65479180321 = 305260^2 + 255889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158662847921 is a prime.

It is not a weakly prime, because it can be changed into another prime (158662847521) 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, 79331423960 + 79331423961.

It is an arithmetic number, because the mean of its divisors is an integer number (79331423961).

Almost surely, 2^158662847921 is an apocalyptic number.

It is an amenable number.

158662847921 is a deficient number, since it is larger than the sum of its proper divisors (1).

158662847921 is an equidigital number, since it uses as much as digits as its factorization.

158662847921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 59.

The spelling of 158662847921 in words is "one hundred fifty-eight billion, six hundred sixty-two million, eight hundred forty-seven thousand, nine hundred twenty-one".