158317191999 has 12 divisors (see below), whose sum is σ = 234860939976. Its totient is φ = 102692232432.

The previous prime is 158317191997. The next prime is 158317192079. The reversal of 158317191999 is 999191713851.

It is not a de Polignac number, because 158317191999 - 2¹ = 158317191997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158317191997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237713169 + ... + 237713834.

It is an arithmetic number, because the mean of its divisors is an integer number (19571744998).

Almost surely, 2^158317191999 is an apocalyptic number.

158317191999 is a deficient number, since it is larger than the sum of its proper divisors (76543747977).

158317191999 is a wasteful number, since it uses less digits than its factorization.

158317191999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475427046 (or 475427043 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 63.

The spelling of 158317191999 in words is "one hundred fifty-eight billion, three hundred seventeen million, one hundred ninety-one thousand, nine hundred ninety-nine".