159865422552 has 640 divisors, whose sum is σ = 537767366400. Its totient is φ = 43837977600.

The previous prime is 159865422539. The next prime is 159865422583. The reversal of 159865422552 is 255224568951.

It is a happy number.

159865422552 is a `hidden beast` number, since 1 + 5 + 9 + 8 + 65 + 4 + 22 + 552 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 305669763 + ... + 305670285.

It is an arithmetic number, because the mean of its divisors is an integer number (840261510).

Almost surely, 2^159865422552 is an apocalyptic number.

159865422552 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 159865422552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268883683200).

159865422552 is an abundant number, since it is smaller than the sum of its proper divisors (377901943848).

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

159865422552 is a wasteful number, since it uses less digits than its factorization.

159865422552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 656 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 54.

The spelling of 159865422552 in words is "one hundred fifty-nine billion, eight hundred sixty-five million, four hundred twenty-two thousand, five hundred fifty-two".