159990217992 has 384 divisors, whose sum is σ = 495315025920. Its totient is φ = 46230912000.

The previous prime is 159990217973. The next prime is 159990217993. The reversal of 159990217992 is 299712099951.

It is not an unprimeable number, because it can be changed into a prime (159990217993) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 307082692 + ... + 307083212.

It is an arithmetic number, because the mean of its divisors is an integer number (1289882880).

Almost surely, 2^159990217992 is an apocalyptic number.

159990217992 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 159990217992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247657512960).

159990217992 is an abundant number, since it is smaller than the sum of its proper divisors (335324807928).

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

159990217992 is a wasteful number, since it uses less digits than its factorization.

159990217992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 8266860, while the sum is 63.

The spelling of 159990217992 in words is "one hundred fifty-nine billion, nine hundred ninety million, two hundred seventeen thousand, nine hundred ninety-two".