159717969840 has 640 divisors, whose sum is σ = 599721615360. Its totient is φ = 34644787200.

The previous prime is 159717969839. The next prime is 159717969847. The reversal of 159717969840 is 48969717951.

It is a super-2 number, since 2×159717969840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (159717969847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 313787506 + ... + 313788014.

It is an arithmetic number, because the mean of its divisors is an integer number (937065024).

Almost surely, 2^159717969840 is an apocalyptic number.

159717969840 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 159717969840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299860807680).

159717969840 is an abundant number, since it is smaller than the sum of its proper divisors (440003645520).

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

159717969840 is a wasteful number, since it uses less digits than its factorization.

159717969840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 66.

The spelling of 159717969840 in words is "one hundred fifty-nine billion, seven hundred seventeen million, nine hundred sixty-nine thousand, eight hundred forty".