12477805729 has 2 divisors, whose sum is σ = 12477805730. Its totient is φ = 12477805728.

The previous prime is 12477805709. The next prime is 12477805733. The reversal of 12477805729 is 92750877421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12349210129 + 128595600 = 111127^2 + 11340^2 .

It is an emirp because it is prime and its reverse (92750877421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12477805729 - 2¹⁵ = 12477772961 is a prime.

It is not a weakly prime, because it can be changed into another prime (12477805709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6238902864 + 6238902865.

It is an arithmetic number, because the mean of its divisors is an integer number (6238902865).

Almost surely, 2^12477805729 is an apocalyptic number.

It is an amenable number.

12477805729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12477805729 is an equidigital number, since it uses as much as digits as its factorization.

12477805729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 12477805729 in words is "twelve billion, four hundred seventy-seven million, eight hundred five thousand, seven hundred twenty-nine".