159491317944 has 768 divisors, whose sum is σ = 540104785920. Its totient is φ = 38873640960.

The previous prime is 159491317933. The next prime is 159491317991. The reversal of 159491317944 is 449713194951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 955037749 + ... + 955037915.

It is an arithmetic number, because the mean of its divisors is an integer number (703261440).

Almost surely, 2^159491317944 is an apocalyptic number.

159491317944 is a gapful number since it is divisible by the number (14) 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 159491317944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270052392960).

159491317944 is an abundant number, since it is smaller than the sum of its proper divisors (380613467976).

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

159491317944 is a wasteful number, since it uses less digits than its factorization.

159491317944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 317 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 57.

The spelling of 159491317944 in words is "one hundred fifty-nine billion, four hundred ninety-one million, three hundred seventeen thousand, nine hundred forty-four".