12872487557 has 2 divisors, whose sum is σ = 12872487558. Its totient is φ = 12872487556.

The previous prime is 12872487541. The next prime is 12872487613. The reversal of 12872487557 is 75578427821.

12872487557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12872487613) can be obtained adding 12872487557 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7561867681 + 5310619876 = 86959^2 + 72874^2 .

It is a cyclic number.

It is not a de Polignac number, because 12872487557 - 2⁴ = 12872487541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12872487157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436243778 + 6436243779.

It is an arithmetic number, because the mean of its divisors is an integer number (6436243779).

Almost surely, 2^12872487557 is an apocalyptic number.

It is an amenable number.

12872487557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12872487557 is an equidigital number, since it uses as much as digits as its factorization.

12872487557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8780800, while the sum is 56.

The spelling of 12872487557 in words is "twelve billion, eight hundred seventy-two million, four hundred eighty-seven thousand, five hundred fifty-seven".