12192731643 has 4 divisors (see below), whose sum is σ = 16256975528. Its totient is φ = 8128487760.

The previous prime is 12192731561. The next prime is 12192731669. The reversal of 12192731643 is 34613729121.

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

It is not a de Polignac number, because 12192731643 - 2¹⁶ = 12192666107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12192731443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032121938 + ... + 2032121943.

It is an arithmetic number, because the mean of its divisors is an integer number (4064243882).

Almost surely, 2^12192731643 is an apocalyptic number.

12192731643 is a deficient number, since it is larger than the sum of its proper divisors (4064243885).

12192731643 is an equidigital number, since it uses as much as digits as its factorization.

12192731643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064243884.

The product of its digits is 54432, while the sum is 39.

The spelling of 12192731643 in words is "twelve billion, one hundred ninety-two million, seven hundred thirty-one thousand, six hundred forty-three".