159636421191 has 32 divisors (see below), whose sum is σ = 241599879360. Its totient is φ = 93060624384.

The previous prime is 159636421181. The next prime is 159636421199. The reversal of 159636421191 is 191124636951.

It is not a de Polignac number, because 159636421191 - 2¹⁸ = 159636159047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159636421191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159636421199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1271626 + ... + 1391511.

It is an arithmetic number, because the mean of its divisors is an integer number (7549996230).

Almost surely, 2^159636421191 is an apocalyptic number.

159636421191 is a deficient number, since it is larger than the sum of its proper divisors (81963458169).

159636421191 is a wasteful number, since it uses less digits than its factorization.

159636421191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663235.

The product of its digits is 349920, while the sum is 48.

The spelling of 159636421191 in words is "one hundred fifty-nine billion, six hundred thirty-six million, four hundred twenty-one thousand, one hundred ninety-one".