111550506061 has 4 divisors (see below), whose sum is σ = 111551185152. Its totient is φ = 111549826972.

The previous prime is 111550506029. The next prime is 111550506071. The reversal of 111550506061 is 160605055111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111550506061 - 2⁵ = 111550506029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111550506071) 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, 78036 + ... + 478738.

It is an arithmetic number, because the mean of its divisors is an integer number (27887796288).

Almost surely, 2^111550506061 is an apocalyptic number.

It is an amenable number.

111550506061 is a deficient number, since it is larger than the sum of its proper divisors (679091).

111550506061 is an equidigital number, since it uses as much as digits as its factorization.

111550506061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679090.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 111550506061 in words is "one hundred eleven billion, five hundred fifty million, five hundred six thousand, sixty-one".