1100550561 has 16 divisors (see below), whose sum is σ = 1652441088. Its totient is φ = 645483600.

The previous prime is 1100550511. The next prime is 1100550601. The reversal of 1100550561 is 1650550011.

It is not a de Polignac number, because 1100550561 - 2⁶ = 1100550497 is a prime.

It is a super-2 number, since 2×1100550561² = 2422423074634829442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1100550511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536881 + ... + 538926.

It is an arithmetic number, because the mean of its divisors is an integer number (103277568).

Almost surely, 2^1100550561 is an apocalyptic number.

1100550561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100550561 is a deficient number, since it is larger than the sum of its proper divisors (551890527).

1100550561 is a wasteful number, since it uses less digits than its factorization.

1100550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075852.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1100550561 is about 33174.5468846223. The cubic root of 1100550561 is about 1032.4523089049.

The spelling of 1100550561 in words is "one billion, one hundred million, five hundred fifty thousand, five hundred sixty-one".