158117238709 has 4 divisors (see below), whose sum is σ = 158131743820. Its totient is φ = 158102733600.

The previous prime is 158117238707. The next prime is 158117238757. The reversal of 158117238709 is 907832711851.

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 67380738084 + 90736500625 = 259578^2 + 301225^2 .

It is a cyclic number.

It is not a de Polignac number, because 158117238709 - 2¹ = 158117238707 is a prime.

It is a super-2 number, since 2×158117238709² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158117238707) 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, 7236192 + ... + 7258009.

It is an arithmetic number, because the mean of its divisors is an integer number (39532935955).

Almost surely, 2^158117238709 is an apocalyptic number.

It is an amenable number.

158117238709 is a deficient number, since it is larger than the sum of its proper divisors (14505111).

158117238709 is a wasteful number, since it uses less digits than its factorization.

158117238709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14505110.

The product of its (nonzero) digits is 846720, while the sum is 52.

The spelling of 158117238709 in words is "one hundred fifty-eight billion, one hundred seventeen million, two hundred thirty-eight thousand, seven hundred nine".