1838521782393 has 16 divisors (see below), whose sum is σ = 2467674074112. Its totient is φ = 1217525850000.

The previous prime is 1838521782313. The next prime is 1838521782421. The reversal of 1838521782393 is 3932871258381.

It is not a de Polignac number, because 1838521782393 - 2¹⁸ = 1838521520249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1838521782313) 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, 27894988 + ... + 27960818.

It is an arithmetic number, because the mean of its divisors is an integer number (154229629632).

Almost surely, 2^{1838521782393} is an apocalyptic number.

It is an amenable number.

1838521782393 is a deficient number, since it is larger than the sum of its proper divisors (629152291719).

1838521782393 is a wasteful number, since it uses less digits than its factorization.

1838521782393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127636.

The product of its digits is 17418240, while the sum is 60.

The spelling of 1838521782393 in words is "one trillion, eight hundred thirty-eight billion, five hundred twenty-one million, seven hundred eighty-two thousand, three hundred ninety-three".