12195128733 has 4 divisors (see below), whose sum is σ = 16260171648. Its totient is φ = 8130085820.

The previous prime is 12195128731. The next prime is 12195128819. The reversal of 12195128733 is 33782159121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12195128733 - 2¹ = 12195128731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12195128731) 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, 2032521453 + ... + 2032521458.

It is an arithmetic number, because the mean of its divisors is an integer number (4065042912).

Almost surely, 2^12195128733 is an apocalyptic number.

It is an amenable number.

12195128733 is a deficient number, since it is larger than the sum of its proper divisors (4065042915).

12195128733 is an equidigital number, since it uses as much as digits as its factorization.

12195128733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065042914.

The product of its digits is 90720, while the sum is 42.

The spelling of 12195128733 in words is "twelve billion, one hundred ninety-five million, one hundred twenty-eight thousand, seven hundred thirty-three".