159772986 has 48 divisors (see below), whose sum is σ = 360255168. Its totient is φ = 53071200.

The previous prime is 159772981. The next prime is 159773051. The reversal of 159772986 is 689277951.

159772986 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 (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (159772981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252891 + ... + 253521.

It is an arithmetic number, because the mean of its divisors is an integer number (7505316).

Almost surely, 2^159772986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159772986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180127584).

159772986 is an abundant number, since it is smaller than the sum of its proper divisors (200482182).

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

159772986 is an equidigital number, since it uses as much as digits as its factorization.

159772986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1157 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 159772986 is about 12640.1339391638. The cubic root of 159772986 is about 542.6266472919.

The spelling of 159772986 in words is "one hundred fifty-nine million, seven hundred seventy-two thousand, nine hundred eighty-six".