111755424561 has 8 divisors (see below), whose sum is σ = 162553344864. Its totient is φ = 67730560320.

The previous prime is 111755424509. The next prime is 111755424629. The reversal of 111755424561 is 165424557111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111755424561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111755424061) 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, 1693263976 + ... + 1693264041.

It is an arithmetic number, because the mean of its divisors is an integer number (20319168108).

Almost surely, 2^111755424561 is an apocalyptic number.

111755424561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111755424561 is a deficient number, since it is larger than the sum of its proper divisors (50797920303).

111755424561 is a wasteful number, since it uses less digits than its factorization.

111755424561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386528031.

The product of its digits is 168000, while the sum is 42.

The spelling of 111755424561 in words is "one hundred eleven billion, seven hundred fifty-five million, four hundred twenty-four thousand, five hundred sixty-one".