1938329742369 has 4 divisors (see below), whose sum is σ = 2584439656496. Its totient is φ = 1292219828244.

The previous prime is 1938329742343. The next prime is 1938329742451. The reversal of 1938329742369 is 9632479238391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1938329742369 - 2³² = 1934034775073 is a prime.

It is a super-2 number, since 2×1938329742369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1938329742329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323054957059 + ... + 323054957064.

It is an arithmetic number, because the mean of its divisors is an integer number (646109914124).

Almost surely, 2^{1938329742369} is an apocalyptic number.

It is an amenable number.

1938329742369 is a deficient number, since it is larger than the sum of its proper divisors (646109914127).

1938329742369 is an equidigital number, since it uses as much as digits as its factorization.

1938329742369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646109914126.

The product of its digits is 105815808, while the sum is 66.

The spelling of 1938329742369 in words is "one trillion, nine hundred thirty-eight billion, three hundred twenty-nine million, seven hundred forty-two thousand, three hundred sixty-nine".