12077777791 has 2 divisors, whose sum is σ = 12077777792. Its totient is φ = 12077777790.

The previous prime is 12077777753. The next prime is 12077777807. The reversal of 12077777791 is 19777777021.

It is a strong prime.

It is an emirp because it is prime and its reverse (19777777021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12077777791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12077777191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6038888895 + 6038888896.

It is an arithmetic number, because the mean of its divisors is an integer number (6038888896).

Almost surely, 2^12077777791 is an apocalyptic number.

12077777791 is a deficient number, since it is larger than the sum of its proper divisors (1).

12077777791 is an equidigital number, since it uses as much as digits as its factorization.

12077777791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2117682, while the sum is 55.

The spelling of 12077777791 in words is "twelve billion, seventy-seven million, seven hundred seventy-seven thousand, seven hundred ninety-one".