12180279977 has 2 divisors, whose sum is σ = 12180279978. Its totient is φ = 12180279976.

The previous prime is 12180279929. The next prime is 12180279983. The reversal of 12180279977 is 77997208121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9021390361 + 3158889616 = 94981^2 + 56204^2 .

It is a cyclic number.

It is not a de Polignac number, because 12180279977 - 2²² = 12176085673 is a prime.

It is not a weakly prime, because it can be changed into another prime (12180279997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6090139988 + 6090139989.

It is an arithmetic number, because the mean of its divisors is an integer number (6090139989).

Almost surely, 2^12180279977 is an apocalyptic number.

It is an amenable number.

12180279977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12180279977 is an equidigital number, since it uses as much as digits as its factorization.

12180279977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 12180279977 in words is "twelve billion, one hundred eighty million, two hundred seventy-nine thousand, nine hundred seventy-seven".