12077439491917 has 4 divisors (see below), whose sum is σ = 12085186407840. Its totient is φ = 12069692575996.

The previous prime is 12077439491903. The next prime is 12077439491921. The reversal of 12077439491917 is 71919493477021.

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 12077439491917 - 2³⁹ = 11527683678029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12077439491617) 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, 3873455623 + ... + 3873458740.

It is an arithmetic number, because the mean of its divisors is an integer number (3021296601960).

Almost surely, 2^{12077439491917} is an apocalyptic number.

It is an amenable number.

12077439491917 is a deficient number, since it is larger than the sum of its proper divisors (7746915923).

12077439491917 is an equidigital number, since it uses as much as digits as its factorization.

12077439491917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746915922.

The product of its (nonzero) digits is 24004512, while the sum is 64.

The spelling of 12077439491917 in words is "twelve trillion, seventy-seven billion, four hundred thirty-nine million, four hundred ninety-one thousand, nine hundred seventeen".