12541025657 has 2 divisors, whose sum is σ = 12541025658. Its totient is φ = 12541025656.

The previous prime is 12541025641. The next prime is 12541025771. The reversal of 12541025657 is 75652014521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6688622656 + 5852403001 = 81784^2 + 76501^2 .

It is an emirp because it is prime and its reverse (75652014521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12541025657 - 2⁴ = 12541025641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12541025657.

It is not a weakly prime, because it can be changed into another prime (12541025617) 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, 6270512828 + 6270512829.

It is an arithmetic number, because the mean of its divisors is an integer number (6270512829).

Almost surely, 2^12541025657 is an apocalyptic number.

It is an amenable number.

12541025657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12541025657 is an equidigital number, since it uses as much as digits as its factorization.

12541025657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 38.

The spelling of 12541025657 in words is "twelve billion, five hundred forty-one million, twenty-five thousand, six hundred fifty-seven".