12638902638773 has 2 divisors, whose sum is σ = 12638902638774. Its totient is φ = 12638902638772.

The previous prime is 12638902638757. The next prime is 12638902638793. The reversal of 12638902638773 is 37783620983621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12144402553924 + 494500084849 = 3484882^2 + 703207^2 .

It is a cyclic number.

It is not a de Polignac number, because 12638902638773 - 2⁴ = 12638902638757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12638902638793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319451319386 + 6319451319387.

It is an arithmetic number, because the mean of its divisors is an integer number (6319451319387).

Almost surely, 2^{12638902638773} is an apocalyptic number.

It is an amenable number.

12638902638773 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638902638773 is an equidigital number, since it uses as much as digits as its factorization.

12638902638773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 65.

The spelling of 12638902638773 in words is "twelve trillion, six hundred thirty-eight billion, nine hundred two million, six hundred thirty-eight thousand, seven hundred seventy-three".