158205473939 has 4 divisors (see below), whose sum is σ = 158745424656. Its totient is φ = 157665523224.

The previous prime is 158205473851. The next prime is 158205473947. The reversal of 158205473939 is 939374502851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939374502851 = 6911 ⋅135924541.

It is a cyclic number.

It is not a de Polignac number, because 158205473939 - 2⁸ = 158205473683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158205473969) 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, 269974919 + ... + 269975504.

It is an arithmetic number, because the mean of its divisors is an integer number (39686356164).

Almost surely, 2^158205473939 is an apocalyptic number.

158205473939 is a deficient number, since it is larger than the sum of its proper divisors (539950717).

158205473939 is an equidigital number, since it uses as much as digits as its factorization.

158205473939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539950716.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 158205473939 in words is "one hundred fifty-eight billion, two hundred five million, four hundred seventy-three thousand, nine hundred thirty-nine".