15881481481842 has 64 divisors (see below), whose sum is σ = 35310313912320. Its totient is φ = 5291108082000.

The previous prime is 15881481481763. The next prime is 15881481481861. The reversal of 15881481481842 is 24818418418851.

15881481481842 is a `hidden beast` number, since 1 + 5 + 8 + 8 + 148 + 1 + 481 + 8 + 4 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 15881481481842.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1091428467 + ... + 1091443017.

It is an arithmetic number, because the mean of its divisors is an integer number (551723654880).

Almost surely, 2^{15881481481842} is an apocalyptic number.

15881481481842 is an abundant number, since it is smaller than the sum of its proper divisors (19428832430478).

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

15881481481842 is a wasteful number, since it uses less digits than its factorization.

15881481481842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23556 (or 23550 counting only the distinct ones).

The product of its digits is 20971520, while the sum is 63.

The spelling of 15881481481842 in words is "fifteen trillion, eight hundred eighty-one billion, four hundred eighty-one million, four hundred eighty-one thousand, eight hundred forty-two".