159966042390 has 288 divisors, whose sum is σ = 540678771360. Its totient is φ = 32428569600.

The previous prime is 159966042389. The next prime is 159966042409. The reversal of 159966042390 is 93240669951.

159966042390 is a `hidden beast` number, since 1 + 5 + 9 + 9 + 6 + 604 + 23 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1948696 + ... + 2029124.

It is an arithmetic number, because the mean of its divisors is an integer number (1877356845).

Almost surely, 2^159966042390 is an apocalyptic number.

159966042390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 159966042390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270339385680).

159966042390 is an abundant number, since it is smaller than the sum of its proper divisors (380712728970).

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

159966042390 is a wasteful number, since it uses less digits than its factorization.

159966042390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80508 (or 80498 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 159966042390 in words is "one hundred fifty-nine billion, nine hundred sixty-six million, forty-two thousand, three hundred ninety".