1109450881 has 16 divisors (see below), whose sum is σ = 1385820288. Its totient is φ = 862876800.

The previous prime is 1109450863. The next prime is 1109450887. The reversal of 1109450881 is 1880549011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109450881 is a prime.

It is a super-2 number, since 2×1109450881² = 2461762514703352322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1109450881.

It is not an unprimeable number, because it can be changed into a prime (1109450887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28341 + ... + 54973.

It is an arithmetic number, because the mean of its divisors is an integer number (86613768).

Almost surely, 2^1109450881 is an apocalyptic number.

1109450881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1109450881 is a deficient number, since it is larger than the sum of its proper divisors (276369407).

1109450881 is a wasteful number, since it uses less digits than its factorization.

1109450881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27192.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 1109450881 is about 33308.4205719815. The cubic root of 1109450881 is about 1035.2280394010.

Adding to 1109450881 its reverse (1880549011), we get a palindrome (2989999892).

The spelling of 1109450881 in words is "one billion, one hundred nine million, four hundred fifty thousand, eight hundred eighty-one".