111554504540 has 24 divisors (see below), whose sum is σ = 235176005232. Its totient is φ = 44448174080.

The previous prime is 111554504539. The next prime is 111554504587. The reversal of 111554504540 is 45405455111.

It is a super-2 number, since 2×111554504540² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111554504540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10846466 + ... + 10856745.

It is an arithmetic number, because the mean of its divisors is an integer number (9799000218).

Almost surely, 2^111554504540 is an apocalyptic number.

111554504540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111554504540 is an abundant number, since it is smaller than the sum of its proper divisors (123621500692).

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

111554504540 is a wasteful number, since it uses less digits than its factorization.

111554504540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21703477 (or 21703475 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 111554504540 its reverse (45405455111), we get a palindrome (156959959651).

The spelling of 111554504540 in words is "one hundred eleven billion, five hundred fifty-four million, five hundred four thousand, five hundred forty".