158168159999 has 4 divisors (see below), whose sum is σ = 158217885960. Its totient is φ = 158118434040.

The previous prime is 158168159971. The next prime is 158168160079. The reversal of 158168159999 is 999951861851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158168159999 - 2¹² = 158168155903 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 (158168152999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24858209 + ... + 24864570.

It is an arithmetic number, because the mean of its divisors is an integer number (39554471490).

Almost surely, 2^158168159999 is an apocalyptic number.

158168159999 is a deficient number, since it is larger than the sum of its proper divisors (49725961).

158168159999 is an equidigital number, since it uses as much as digits as its factorization.

158168159999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49725960.

The product of its digits is 62985600, while the sum is 71.

The spelling of 158168159999 in words is "one hundred fifty-eight billion, one hundred sixty-eight million, one hundred fifty-nine thousand, nine hundred ninety-nine".