158979985920 has 960 divisors, whose sum is σ = 685590048000. Its totient is φ = 33220067328.

The previous prime is 158979985907. The next prime is 158979985963. The reversal of 158979985920 is 29589979851.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 88864386 + ... + 88866174.

It is an arithmetic number, because the mean of its divisors is an integer number (714156300).

Almost surely, 2^158979985920 is an apocalyptic number.

158979985920 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 158979985920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342795024000).

158979985920 is an abundant number, since it is smaller than the sum of its proper divisors (526610062080).

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

158979985920 is a wasteful number, since it uses less digits than its factorization.

158979985920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 146966400, while the sum is 72.

The spelling of 158979985920 in words is "one hundred fifty-eight billion, nine hundred seventy-nine million, nine hundred eighty-five thousand, nine hundred twenty".