12637801639 has 2 divisors, whose sum is σ = 12637801640. Its totient is φ = 12637801638.

The previous prime is 12637801637. The next prime is 12637801679. The reversal of 12637801639 is 93610873621.

12637801639 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 is an emirp because it is prime and its reverse (93610873621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12637801639 - 2¹ = 12637801637 is a prime.

It is a super-2 number, since 2×12637801639² (a number of 21 digits) contains 22 as substring.

Together with 12637801637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637801637) 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, 6318900819 + 6318900820.

It is an arithmetic number, because the mean of its divisors is an integer number (6318900820).

Almost surely, 2^12637801639 is an apocalyptic number.

12637801639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637801639 is an equidigital number, since it uses as much as digits as its factorization.

12637801639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 12637801639 in words is "twelve billion, six hundred thirty-seven million, eight hundred one thousand, six hundred thirty-nine".