158123821937 has 4 divisors (see below), whose sum is σ = 158190234996. Its totient is φ = 158057408880.

The previous prime is 158123821909. The next prime is 158123821943. The reversal of 158123821937 is 739128321851.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76870889536 + 81252932401 = 277256^2 + 285049^2 .

It is a cyclic number.

It is not a de Polignac number, because 158123821937 - 2³⁰ = 157050080113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158123821957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33202958 + ... + 33207719.

It is an arithmetic number, because the mean of its divisors is an integer number (39547558749).

Almost surely, 2^158123821937 is an apocalyptic number.

It is an amenable number.

158123821937 is a deficient number, since it is larger than the sum of its proper divisors (66413059).

158123821937 is an equidigital number, since it uses as much as digits as its factorization.

158123821937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66413058.

The product of its digits is 725760, while the sum is 50.

The spelling of 158123821937 in words is "one hundred fifty-eight billion, one hundred twenty-three million, eight hundred twenty-one thousand, nine hundred thirty-seven".