1638090009013 has 2 divisors, whose sum is σ = 1638090009014. Its totient is φ = 1638090009012.

The previous prime is 1638090009007. The next prime is 1638090009091. The reversal of 1638090009013 is 3109000908361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1629827562609 + 8262446404 = 1276647^2 + 90898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1638090009013 - 2⁵ = 1638090008981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1638090009713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819045004506 + 819045004507.

It is an arithmetic number, because the mean of its divisors is an integer number (819045004507).

Almost surely, 2^{1638090009013} is an apocalyptic number.

It is an amenable number.

1638090009013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638090009013 is an equidigital number, since it uses as much as digits as its factorization.

1638090009013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 1638090009013 in words is "one trillion, six hundred thirty-eight billion, ninety million, nine thousand, thirteen".