12179728691 has 8 divisors (see below), whose sum is σ = 13117739040. Its totient is φ = 11241876672.

The previous prime is 12179728681. The next prime is 12179728703. The reversal of 12179728691 is 19682797121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12179728691 - 2¹⁸ = 12179466547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12179728651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156026 + ... + 220688.

It is an arithmetic number, because the mean of its divisors is an integer number (1639717380).

Almost surely, 2^12179728691 is an apocalyptic number.

12179728691 is a deficient number, since it is larger than the sum of its proper divisors (938010349).

12179728691 is a wasteful number, since it uses less digits than its factorization.

12179728691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79165.

The product of its digits is 762048, while the sum is 53.

The spelling of 12179728691 in words is "twelve billion, one hundred seventy-nine million, seven hundred twenty-eight thousand, six hundred ninety-one".