159536721140 has 96 divisors (see below), whose sum is σ = 358430800896. Its totient is φ = 59499714560.

The previous prime is 159536721131. The next prime is 159536721143. The reversal of 159536721140 is 41127635951.

It is a junction number, because it is equal to n+sod(n) for n = 159536721091 and 159536721100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159536721143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27023429 + ... + 27029331.

It is an arithmetic number, because the mean of its divisors is an integer number (3733654176).

Almost surely, 2^159536721140 is an apocalyptic number.

159536721140 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 159536721140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179215400448).

159536721140 is an abundant number, since it is smaller than the sum of its proper divisors (198894079756).

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

159536721140 is a wasteful number, since it uses less digits than its factorization.

159536721140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7409 (or 7407 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 159536721140 in words is "one hundred fifty-nine billion, five hundred thirty-six million, seven hundred twenty-one thousand, one hundred forty".