1109281556 has 12 divisors (see below), whose sum is σ = 2003863680. Its totient is φ = 536749080.

The previous prime is 1109281553. The next prime is 1109281561. The reversal of 1109281556 is 6551829011.

It is a super-2 number, since 2×1109281556² = 2461011140963562272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109281553) 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, 4472786 + ... + 4473033.

It is an arithmetic number, because the mean of its divisors is an integer number (166988640).

Almost surely, 2^1109281556 is an apocalyptic number.

It is an amenable number.

1109281556 is a deficient number, since it is larger than the sum of its proper divisors (894582124).

1109281556 is a wasteful number, since it uses less digits than its factorization.

1109281556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8945854 (or 8945852 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 38.

The square root of 1109281556 is about 33305.8787003136. The cubic root of 1109281556 is about 1035.1753710317.

The spelling of 1109281556 in words is "one billion, one hundred nine million, two hundred eighty-one thousand, five hundred fifty-six".