159797760 has 80 divisors (see below), whose sum is σ = 510878016. Its totient is φ = 42610688.

The previous prime is 159797749. The next prime is 159797837. The reversal of 159797760 is 67797951.

It is a tau number, because it is divible by the number of its divisors (80).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 18083.

Almost surely, 2^159797760 is an apocalyptic number.

159797760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159797760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255439008).

159797760 is an abundant number, since it is smaller than the sum of its proper divisors (351080256).

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

159797760 is an equidigital number, since it uses as much as digits as its factorization.

159797760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20833 (or 20817 counting only the distinct ones).

The product of its (nonzero) digits is 833490, while the sum is 51.

The square root of 159797760 is about 12641.1138749716. The cubic root of 159797760 is about 542.6546919531.

The spelling of 159797760 in words is "one hundred fifty-nine million, seven hundred ninety-seven thousand, seven hundred sixty".