158726328561 has 24 divisors (see below), whose sum is σ = 230275229184. Its totient is φ = 105354564000.

The previous prime is 158726328533. The next prime is 158726328599. The reversal of 158726328561 is 165823627851.

158726328561 is a `hidden beast` number, since 1 + 5 + 8 + 72 + 6 + 3 + 2 + 8 + 561 = 666.

158726328561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158726328561 - 2¹⁴ = 158726312177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158726328498 and 158726328507.

It is not an unprimeable number, because it can be changed into a prime (158726328661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6396400 + ... + 6421166.

It is an arithmetic number, because the mean of its divisors is an integer number (9594801216).

Almost surely, 2^158726328561 is an apocalyptic number.

It is an amenable number.

158726328561 is a deficient number, since it is larger than the sum of its proper divisors (71548900623).

158726328561 is a wasteful number, since it uses less digits than its factorization.

158726328561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27861 (or 27858 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 158726328561 in words is "one hundred fifty-eight billion, seven hundred twenty-six million, three hundred twenty-eight thousand, five hundred sixty-one".