16131616571 has 4 divisors (see below), whose sum is σ = 18436133232. Its totient is φ = 13827099912.

The previous prime is 16131616517. The next prime is 16131616601. The reversal of 16131616571 is 17561613161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16131616571 - 2⁶ = 16131616507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16131610571) 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 3 ways as a sum of consecutive naturals, for example, 1152258320 + ... + 1152258333.

It is an arithmetic number, because the mean of its divisors is an integer number (4609033308).

Almost surely, 2^16131616571 is an apocalyptic number.

16131616571 is a deficient number, since it is larger than the sum of its proper divisors (2304516661).

16131616571 is an equidigital number, since it uses as much as digits as its factorization.

16131616571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304516660.

The product of its digits is 22680, while the sum is 38.

The spelling of 16131616571 in words is "sixteen billion, one hundred thirty-one million, six hundred sixteen thousand, five hundred seventy-one".