158578715887 has 4 divisors (see below), whose sum is σ = 159408971136. Its totient is φ = 157748460640.

The previous prime is 158578715873. The next prime is 158578715927. The reversal of 158578715887 is 788517875851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788517875851 = 18371 ⋅42921881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158578715887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158578715587) 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, 415127338 + ... + 415127719.

It is an arithmetic number, because the mean of its divisors is an integer number (39852242784).

Almost surely, 2^158578715887 is an apocalyptic number.

158578715887 is a deficient number, since it is larger than the sum of its proper divisors (830255249).

158578715887 is an equidigital number, since it uses as much as digits as its factorization.

158578715887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830255248.

The product of its digits is 175616000, while the sum is 70.

The spelling of 158578715887 in words is "one hundred fifty-eight billion, five hundred seventy-eight million, seven hundred fifteen thousand, eight hundred eighty-seven".