12138793461 has 8 divisors (see below), whose sum is σ = 17983397760. Its totient is φ = 8092528956.

The previous prime is 12138793351. The next prime is 12138793481. The reversal of 12138793461 is 16439783121.

12138793461 is a `hidden beast` number, since 1 + 21 + 3 + 87 + 93 + 461 = 666.

It is not a de Polignac number, because 12138793461 - 2⁷ = 12138793333 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138793481) 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 7 ways as a sum of consecutive naturals, for example, 224792445 + ... + 224792498.

It is an arithmetic number, because the mean of its divisors is an integer number (2247924720).

Almost surely, 2^12138793461 is an apocalyptic number.

It is an amenable number.

12138793461 is a deficient number, since it is larger than the sum of its proper divisors (5844604299).

12138793461 is an equidigital number, since it uses as much as digits as its factorization.

12138793461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449584952 (or 449584946 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 12138793461 in words is "twelve billion, one hundred thirty-eight million, seven hundred ninety-three thousand, four hundred sixty-one".