2638812683939 has 2 divisors, whose sum is σ = 2638812683940. Its totient is φ = 2638812683938.

The previous prime is 2638812683849. The next prime is 2638812683971. The reversal of 2638812683939 is 9393862188362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638812683939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2638812683989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319406341969 + 1319406341970.

It is an arithmetic number, because the mean of its divisors is an integer number (1319406341970).

Almost surely, 2^{2638812683939} is an apocalyptic number.

2638812683939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638812683939 is an equidigital number, since it uses as much as digits as its factorization.

2638812683939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161243136, while the sum is 68.

The spelling of 2638812683939 in words is "two trillion, six hundred thirty-eight billion, eight hundred twelve million, six hundred eighty-three thousand, nine hundred thirty-nine".