159686640 has 200 divisors, whose sum is σ = 584255760. Its totient is φ = 40310784.

The previous prime is 159686623. The next prime is 159686641. The reversal of 159686640 is 46686951.

159686640 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 (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159686641) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 122472 + ... + 123768.

Almost surely, 2^159686640 is an apocalyptic number.

159686640 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 159686640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292127880).

159686640 is an abundant number, since it is smaller than the sum of its proper divisors (424569120).

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

159686640 is a wasteful number, since it uses less digits than its factorization.

159686640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 159686640 is about 12636.7179283230. The cubic root of 159686640 is about 542.5288792345.

The spelling of 159686640 in words is "one hundred fifty-nine million, six hundred eighty-six thousand, six hundred forty".