15871438191 has 32 divisors (see below), whose sum is σ = 24362477568. Its totient is φ = 9002972160.

The previous prime is 15871438189. The next prime is 15871438223. The reversal of 15871438191 is 19183417851.

It is not a de Polignac number, because 15871438191 - 2¹ = 15871438189 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 15871438191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15871438151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5217631 + ... + 5220671.

It is an arithmetic number, because the mean of its divisors is an integer number (761327424).

Almost surely, 2^15871438191 is an apocalyptic number.

15871438191 is a deficient number, since it is larger than the sum of its proper divisors (8491039377).

15871438191 is a wasteful number, since it uses less digits than its factorization.

15871438191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its digits is 241920, while the sum is 48.

The spelling of 15871438191 in words is "fifteen billion, eight hundred seventy-one million, four hundred thirty-eight thousand, one hundred ninety-one".