159729911172 has 240 divisors, whose sum is σ = 464344860672. Its totient is φ = 47564858880.

The previous prime is 159729911153. The next prime is 159729911179. The reversal of 159729911172 is 271119927951.

159729911172 is a `hidden beast` number, since 1 + 597 + 29 + 9 + 11 + 17 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (159729911179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 21928243 + ... + 21935525.

Almost surely, 2^159729911172 is an apocalyptic number.

159729911172 is a gapful number since it is divisible by the number (12) 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 159729911172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232172430336).

159729911172 is an abundant number, since it is smaller than the sum of its proper divisors (304614949500).

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

159729911172 is a wasteful number, since it uses less digits than its factorization.

159729911172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480 (or 7469 counting only the distinct ones).

The product of its digits is 714420, while the sum is 54.

The spelling of 159729911172 in words is "one hundred fifty-nine billion, seven hundred twenty-nine million, nine hundred eleven thousand, one hundred seventy-two".