159821860500 has 288 divisors, whose sum is σ = 514290416640. Its totient is φ = 41770080000.

The previous prime is 159821860483. The next prime is 159821860529. The reversal of 159821860500 is 5068128951.

It is a happy number.

159821860500 is a `hidden beast` number, since 1 + 5 + 9 + 82 + 1 + 8 + 60 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 90858621 + ... + 90860379.

Almost surely, 2^159821860500 is an apocalyptic number.

159821860500 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 159821860500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257145208320).

159821860500 is an abundant number, since it is smaller than the sum of its proper divisors (354468556140).

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

159821860500 is a wasteful number, since it uses less digits than its factorization.

159821860500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 159821860500 in words is "one hundred fifty-nine billion, eight hundred twenty-one million, eight hundred sixty thousand, five hundred".