1838381929109 has 16 divisors (see below), whose sum is σ = 2136506103360. Its totient is φ = 1563297096960.

The previous prime is 1838381929091. The next prime is 1838381929121. The reversal of 1838381929109 is 9019291838381.

It is a cyclic number.

It is not a de Polignac number, because 1838381929109 - 2⁸ = 1838381928853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838381929409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30125714 + ... + 30186675.

It is an arithmetic number, because the mean of its divisors is an integer number (133531631460).

Almost surely, 2^{1838381929109} is an apocalyptic number.

It is an amenable number.

1838381929109 is a deficient number, since it is larger than the sum of its proper divisors (298124174251).

1838381929109 is a wasteful number, since it uses less digits than its factorization.

1838381929109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60312580.

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

The spelling of 1838381929109 in words is "one trillion, eight hundred thirty-eight billion, three hundred eighty-one million, nine hundred twenty-nine thousand, one hundred nine".