15881844161 has 16 divisors (see below), whose sum is σ = 16508371968. Its totient is φ = 15269342400.

The previous prime is 15881844137. The next prime is 15881844169. The reversal of 15881844161 is 16144818851.

15881844161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15881844161 - 2¹⁴ = 15881827777 is a prime.

It is a super-3 number, since 3×15881844161³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15881844169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867080 + ... + 885206.

It is an arithmetic number, because the mean of its divisors is an integer number (1031773248).

Almost surely, 2^15881844161 is an apocalyptic number.

It is an amenable number.

15881844161 is a deficient number, since it is larger than the sum of its proper divisors (626527807).

15881844161 is a wasteful number, since it uses less digits than its factorization.

15881844161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18512.

The product of its digits is 245760, while the sum is 47.

The spelling of 15881844161 in words is "fifteen billion, eight hundred eighty-one million, eight hundred forty-four thousand, one hundred sixty-one".