1838381929091 has 2 divisors, whose sum is σ = 1838381929092. Its totient is φ = 1838381929090.

The previous prime is 1838381929067. The next prime is 1838381929121. The reversal of 1838381929091 is 1909291838381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1838381929091 - 2²⁶ = 1838314820227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1838381929061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919190964545 + 919190964546.

It is an arithmetic number, because the mean of its divisors is an integer number (919190964546).

Almost surely, 2^{1838381929091} is an apocalyptic number.

1838381929091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838381929091 is an equidigital number, since it uses as much as digits as its factorization.

1838381929091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 1838381929091 in words is "one trillion, eight hundred thirty-eight billion, three hundred eighty-one million, nine hundred twenty-nine thousand, ninety-one".