159436121856 has 144 divisors (see below), whose sum is σ = 463297029888. Its totient is φ = 48273408000.

The previous prime is 159436121849. The next prime is 159436121857. The reversal of 159436121856 is 658121634951.

It is a junction number, because it is equal to n+sod(n) for n = 159436121799 and 159436121808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159436121857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10949781 + ... + 10964331.

Almost surely, 2^159436121856 is an apocalyptic number.

159436121856 is a gapful number since it is divisible by the number (16) 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 159436121856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231648514944).

159436121856 is an abundant number, since it is smaller than the sum of its proper divisors (303860908032).

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

159436121856 is a wasteful number, since it uses less digits than its factorization.

159436121856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15878 (or 15864 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The spelling of 159436121856 in words is "one hundred fifty-nine billion, four hundred thirty-six million, one hundred twenty-one thousand, eight hundred fifty-six".