12637624981 has 2 divisors, whose sum is σ = 12637624982. Its totient is φ = 12637624980.

The previous prime is 12637624963. The next prime is 12637625083. The reversal of 12637624981 is 18942673621.

It is a happy number.

12637624981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12478007025 + 159617956 = 111705^2 + 12634^2 .

It is an emirp because it is prime and its reverse (18942673621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12637624981 - 2¹⁷ = 12637493909 is a prime.

It is a super-2 number, since 2×12637624981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637684981) 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, 6318812490 + 6318812491.

It is an arithmetic number, because the mean of its divisors is an integer number (6318812491).

Almost surely, 2^12637624981 is an apocalyptic number.

It is an amenable number.

12637624981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637624981 is an equidigital number, since it uses as much as digits as its factorization.

12637624981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The spelling of 12637624981 in words is "twelve billion, six hundred thirty-seven million, six hundred twenty-four thousand, nine hundred eighty-one".