158661144 has 96 divisors (see below), whose sum is σ = 446977440. Its totient is φ = 50803200.

The previous prime is 158661137. The next prime is 158661169. The reversal of 158661144 is 441166851.

158661144 is a `hidden beast` number, since 1 + 586 + 61 + 14 + 4 = 666.

158661144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 158661099 and 158661108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209214 + ... + 209970.

It is an arithmetic number, because the mean of its divisors is an integer number (4656015).

Almost surely, 2^158661144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158661144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223488720).

158661144 is an abundant number, since it is smaller than the sum of its proper divisors (288316296).

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

158661144 is a wasteful number, since it uses less digits than its factorization.

158661144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 874 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 158661144 is about 12596.0765320000. The cubic root of 158661144 is about 541.3650239212.

The spelling of 158661144 in words is "one hundred fifty-eight million, six hundred sixty-one thousand, one hundred forty-four".