158742985799 has 4 divisors (see below), whose sum is σ = 158744007336. Its totient is φ = 158741964264.

The previous prime is 158742985789. The next prime is 158742985861. The reversal of 158742985799 is 997589247851.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158742985799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158742985729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224009 + ... + 606354.

It is an arithmetic number, because the mean of its divisors is an integer number (39686001834).

Almost surely, 2^158742985799 is an apocalyptic number.

158742985799 is a deficient number, since it is larger than the sum of its proper divisors (1021537).

158742985799 is an equidigital number, since it uses as much as digits as its factorization.

158742985799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021536.

The product of its digits is 457228800, while the sum is 74.

The spelling of 158742985799 in words is "one hundred fifty-eight billion, seven hundred forty-two million, nine hundred eighty-five thousand, seven hundred ninety-nine".