111638158428 has 24 divisors (see below), whose sum is σ = 260619141888. Its totient is φ = 37194132976.

The previous prime is 111638158421. The next prime is 111638158439. The reversal of 111638158428 is 824851836111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111638158421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2298276 + ... + 2346347.

It is an arithmetic number, because the mean of its divisors is an integer number (10859130912).

Almost surely, 2^111638158428 is an apocalyptic number.

It is an amenable number.

111638158428 is an abundant number, since it is smaller than the sum of its proper divisors (148980983460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111638158428 is a wasteful number, since it uses less digits than its factorization.

111638158428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4646633 (or 4646631 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The spelling of 111638158428 in words is "one hundred eleven billion, six hundred thirty-eight million, one hundred fifty-eight thousand, four hundred twenty-eight".