1105561056 has 192 divisors, whose sum is σ = 3240276480. Its totient is φ = 329370624.

The previous prime is 1105561027. The next prime is 1105561081. The reversal of 1105561056 is 6501655011.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15144636 + ... + 15144708.

It is an arithmetic number, because the mean of its divisors is an integer number (16876440).

Almost surely, 2^1105561056 is an apocalyptic number.

1105561056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1105561056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620138240).

1105561056 is an abundant number, since it is smaller than the sum of its proper divisors (2134715424).

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

1105561056 is an equidigital number, since it uses as much as digits as its factorization.

1105561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 1105561056 is about 33249.9782857072. The cubic root of 1105561056 is about 1034.0167581185.

The spelling of 1105561056 in words is "one billion, one hundred five million, five hundred sixty-one thousand, fifty-six".