159121409688 has 96 divisors (see below), whose sum is σ = 451522977360. Its totient is φ = 52493598720.

The previous prime is 159121409687. The next prime is 159121409729. The reversal of 159121409688 is 886904121951.

159121409688 is a `hidden beast` number, since 1 + 59 + 121 + 409 + 68 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159121409687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233353 + ... + 610488.

Almost surely, 2^159121409688 is an apocalyptic number.

159121409688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

159121409688 is an abundant number, since it is smaller than the sum of its proper divisors (292401567672).

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

159121409688 is an equidigital number, since it uses as much as digits as its factorization.

159121409688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843959 (or 843943 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 159121409688 in words is "one hundred fifty-nine billion, one hundred twenty-one million, four hundred nine thousand, six hundred eighty-eight".