1938663049111 has 4 divisors (see below), whose sum is σ = 1942058256424. Its totient is φ = 1935267841800.

The previous prime is 1938663049093. The next prime is 1938663049129. The reversal of 1938663049111 is 1119403668391.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1938663049093) and next prime (1938663049129).

It is a cyclic number.

It is not a de Polignac number, because 1938663049111 - 2⁷ = 1938663048983 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 (1938663049171) 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, 1697602800 + ... + 1697603941.

It is an arithmetic number, because the mean of its divisors is an integer number (485514564106).

Almost surely, 2^{1938663049111} is an apocalyptic number.

1938663049111 is a deficient number, since it is larger than the sum of its proper divisors (3395207313).

1938663049111 is an equidigital number, since it uses as much as digits as its factorization.

1938663049111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395207312.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 1938663049111 in words is "one trillion, nine hundred thirty-eight billion, six hundred sixty-three million, forty-nine thousand, one hundred eleven".