158863566 has 32 divisors (see below), whose sum is σ = 333613440. Its totient is φ = 50361696.

The previous prime is 158863559. The next prime is 158863567. The reversal of 158863566 is 665368851.

158863566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158863567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4845 + ... + 18471.

It is an arithmetic number, because the mean of its divisors is an integer number (10425420).

Almost surely, 2^158863566 is an apocalyptic number.

158863566 is an abundant number, since it is smaller than the sum of its proper divisors (174749874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158863566 is a wasteful number, since it uses less digits than its factorization.

158863566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728.

The product of its digits is 1036800, while the sum is 48.

The square root of 158863566 is about 12604.1090918795. The cubic root of 158863566 is about 541.5951529835.

The spelling of 158863566 in words is "one hundred fifty-eight million, eight hundred sixty-three thousand, five hundred sixty-six".