16271231563 has 4 divisors (see below), whose sum is σ = 16271645728. Its totient is φ = 16270817400.

The previous prime is 16271231513. The next prime is 16271231569. The reversal of 16271231563 is 36513217261.

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 16271231563 - 2¹⁷ = 16271100491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16271231569) 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, 141156 + ... + 229057.

It is an arithmetic number, because the mean of its divisors is an integer number (4067911432).

Almost surely, 2^16271231563 is an apocalyptic number.

16271231563 is a deficient number, since it is larger than the sum of its proper divisors (414165).

16271231563 is an equidigital number, since it uses as much as digits as its factorization.

16271231563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414164.

The product of its digits is 45360, while the sum is 37.

The spelling of 16271231563 in words is "sixteen billion, two hundred seventy-one million, two hundred thirty-one thousand, five hundred sixty-three".