12477925561 has 2 divisors, whose sum is σ = 12477925562. Its totient is φ = 12477925560.

The previous prime is 12477925553. The next prime is 12477925597. The reversal of 12477925561 is 16552977421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11234940025 + 1242985536 = 105995^2 + 35256^2 .

It is an emirp because it is prime and its reverse (16552977421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12477925561 - 2³ = 12477925553 is a prime.

It is not a weakly prime, because it can be changed into another prime (12477925511) 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 as a sum of consecutive naturals, namely, 6238962780 + 6238962781.

It is an arithmetic number, because the mean of its divisors is an integer number (6238962781).

Almost surely, 2^12477925561 is an apocalyptic number.

It is an amenable number.

12477925561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12477925561 is an equidigital number, since it uses as much as digits as its factorization.

12477925561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The spelling of 12477925561 in words is "twelve billion, four hundred seventy-seven million, nine hundred twenty-five thousand, five hundred sixty-one".