159994392934321 has 27 divisors (see below), whose sum is σ = 185607697521099. Its totient is φ = 137791937210400.

The previous prime is 159994392934319. The next prime is 159994392934349. The reversal of 159994392934321 is 123439293499951.

The square root of 159994392934321 is 12648889.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24182406188721 + 135811986745600 = 4917561^2 + 11653840^2 .

It is not a de Polignac number, because 159994392934321 - 2¹ = 159994392934319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159994392934301) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2643587541 + ... + 2643648061.

Almost surely, 2^{159994392934321} is an apocalyptic number.

159994392934321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

159994392934321 is the 12648889-th square number.

159994392934321 is the 6324445-th centered octagonal number.

It is an amenable number.

159994392934321 is a deficient number, since it is larger than the sum of its proper divisors (25613304586778).

159994392934321 is an frugal number, since it uses more digits than its factorization.

159994392934321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121102 (or 60551 counting only the distinct ones).

The product of its digits is 510183360, while the sum is 73.

The spelling of 159994392934321 in words is "one hundred fifty-nine trillion, nine hundred ninety-four billion, three hundred ninety-two million, nine hundred thirty-four thousand, three hundred twenty-one".