1938688894037 has 4 divisors (see below), whose sum is σ = 2215644450336. Its totient is φ = 1661733337740.

The previous prime is 1938688894007. The next prime is 1938688894073. The reversal of 1938688894037 is 7304988868391.

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 1938688894037 - 2⁸ = 1938688893781 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 (1938688894007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138477778139 + ... + 138477778152.

It is an arithmetic number, because the mean of its divisors is an integer number (553911112584).

Almost surely, 2^{1938688894037} is an apocalyptic number.

It is an amenable number.

1938688894037 is a deficient number, since it is larger than the sum of its proper divisors (276955556299).

1938688894037 is an equidigital number, since it uses as much as digits as its factorization.

1938688894037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276955556298.

The product of its (nonzero) digits is 501645312, while the sum is 74.

The spelling of 1938688894037 in words is "one trillion, nine hundred thirty-eight billion, six hundred eighty-eight million, eight hundred ninety-four thousand, thirty-seven".