158891438993 has 8 divisors (see below), whose sum is σ = 181689406080. Its totient is φ = 136118269440.

The previous prime is 158891438971. The next prime is 158891439017. The reversal of 158891438993 is 399834198851.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 158891438993 - 2²⁶ = 158824330129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158891438593) 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, 6185648 + ... + 6211281.

It is an arithmetic number, because the mean of its divisors is an integer number (22711175760).

Almost surely, 2^158891438993 is an apocalyptic number.

It is an amenable number.

158891438993 is a deficient number, since it is larger than the sum of its proper divisors (22797967087).

158891438993 is a wasteful number, since it uses less digits than its factorization.

158891438993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398767.

The product of its digits is 67184640, while the sum is 68.

The spelling of 158891438993 in words is "one hundred fifty-eight billion, eight hundred ninety-one million, four hundred thirty-eight thousand, nine hundred ninety-three".