158536717987 has 8 divisors (see below), whose sum is σ = 163732736000. Its totient is φ = 153345820680.

The previous prime is 158536717951. The next prime is 158536717993. The reversal of 158536717987 is 789717635851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158536717987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158536717907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1217193 + ... + 1341130.

It is an arithmetic number, because the mean of its divisors is an integer number (20466592000).

Almost surely, 2^158536717987 is an apocalyptic number.

158536717987 is a deficient number, since it is larger than the sum of its proper divisors (5196018013).

158536717987 is a wasteful number, since it uses less digits than its factorization.

158536717987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560353.

The product of its digits is 88905600, while the sum is 67.

The spelling of 158536717987 in words is "one hundred fifty-eight billion, five hundred thirty-six million, seven hundred seventeen thousand, nine hundred eighty-seven".