111553551440 has 40 divisors (see below), whose sum is σ = 263757984480. Its totient is φ = 43865123456.

The previous prime is 111553551437. The next prime is 111553551457. The reversal of 111553551440 is 44155355111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 111553551440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11812394 + ... + 11821833.

It is an arithmetic number, because the mean of its divisors is an integer number (6593949612).

Almost surely, 2^111553551440 is an apocalyptic number.

111553551440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111553551440 is an abundant number, since it is smaller than the sum of its proper divisors (152204433040).

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

111553551440 is a wasteful number, since it uses less digits than its factorization.

111553551440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23634299 (or 23634293 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 111553551440 in words is "one hundred eleven billion, five hundred fifty-three million, five hundred fifty-one thousand, four hundred forty".