12501664277 has 2 divisors, whose sum is σ = 12501664278. Its totient is φ = 12501664276.

The previous prime is 12501664249. The next prime is 12501664313. The reversal of 12501664277 is 77246610521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11905864996 + 595799281 = 109114^2 + 24409^2 .

It is an emirp because it is prime and its reverse (77246610521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12501664277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12501664247) 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, 6250832138 + 6250832139.

It is an arithmetic number, because the mean of its divisors is an integer number (6250832139).

Almost surely, 2^12501664277 is an apocalyptic number.

It is an amenable number.

12501664277 is a deficient number, since it is larger than the sum of its proper divisors (1).

12501664277 is an equidigital number, since it uses as much as digits as its factorization.

12501664277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 12501664277 in words is "twelve billion, five hundred one million, six hundred sixty-four thousand, two hundred seventy-seven".