159855434240 has 80 divisors (see below), whose sum is σ = 384806933280. Its totient is φ = 63687168000.

The previous prime is 159855434239. The next prime is 159855434243. The reversal of 159855434240 is 42434558951.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (159855434243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518171 + ... + 766949.

It is an arithmetic number, because the mean of its divisors is an integer number (4810086666).

Almost surely, 2^159855434240 is an apocalyptic number.

159855434240 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 159855434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192403466640).

159855434240 is an abundant number, since it is smaller than the sum of its proper divisors (224951499040).

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

159855434240 is an equidigital number, since it uses as much as digits as its factorization.

159855434240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249053 (or 249037 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 50.

The spelling of 159855434240 in words is "one hundred fifty-nine billion, eight hundred fifty-five million, four hundred thirty-four thousand, two hundred forty".