158819217909 has 16 divisors (see below), whose sum is σ = 234925194240. Its totient is φ = 94622645360.

The previous prime is 158819217883. The next prime is 158819217917. The reversal of 158819217909 is 909712918851.

It is a cyclic number.

It is not a de Polignac number, because 158819217909 - 2³⁵ = 124459479541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158819217919) 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 15 ways as a sum of consecutive naturals, for example, 40783677 + ... + 40787570.

It is an arithmetic number, because the mean of its divisors is an integer number (14682824640).

Almost surely, 2^158819217909 is an apocalyptic number.

It is an amenable number.

158819217909 is a deficient number, since it is larger than the sum of its proper divisors (76105976331).

158819217909 is a wasteful number, since it uses less digits than its factorization.

158819217909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81571320.

The product of its (nonzero) digits is 3265920, while the sum is 60.

The spelling of 158819217909 in words is "one hundred fifty-eight billion, eight hundred nineteen million, two hundred seventeen thousand, nine hundred nine".