158742985789 has 2 divisors, whose sum is σ = 158742985790. Its totient is φ = 158742985788.

The previous prime is 158742985763. The next prime is 158742985861. The reversal of 158742985789 is 987589247851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109938664900 + 48804320889 = 331570^2 + 220917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158742985789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158742985729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79371492894 + 79371492895.

It is an arithmetic number, because the mean of its divisors is an integer number (79371492895).

Almost surely, 2^158742985789 is an apocalyptic number.

It is an amenable number.

158742985789 is a deficient number, since it is larger than the sum of its proper divisors (1).

158742985789 is an equidigital number, since it uses as much as digits as its factorization.

158742985789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 406425600, while the sum is 73.

The spelling of 158742985789 in words is "one hundred fifty-eight billion, seven hundred forty-two million, nine hundred eighty-five thousand, seven hundred eighty-nine".