111638773247 has 4 divisors (see below), whose sum is σ = 112682126376. Its totient is φ = 110595420120.

The previous prime is 111638773241. The next prime is 111638773283. The reversal of 111638773247 is 742377836111.

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

It is a cyclic number.

It is not a de Polignac number, because 111638773247 - 2⁸ = 111638772991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111638773195 and 111638773204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111638773241) 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, 521676404 + ... + 521676617.

It is an arithmetic number, because the mean of its divisors is an integer number (28170531594).

Almost surely, 2^111638773247 is an apocalyptic number.

111638773247 is a deficient number, since it is larger than the sum of its proper divisors (1043353129).

111638773247 is a wasteful number, since it uses less digits than its factorization.

111638773247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043353128.

The product of its digits is 1185408, while the sum is 50.

The spelling of 111638773247 in words is "one hundred eleven billion, six hundred thirty-eight million, seven hundred seventy-three thousand, two hundred forty-seven".