1109832561 has 12 divisors (see below), whose sum is σ = 1633339188. Its totient is φ = 725927904.

The previous prime is 1109832557. The next prime is 1109832599. The reversal of 1109832561 is 1652389011.

1109832561 is a `hidden beast` number, since 1 + 1 + 0 + 98 + 3 + 2 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 420455025 + 689377536 = 20505^2 + 26256^2 .

It is not a de Polignac number, because 1109832561 - 2² = 1109832557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1109831561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1162870 + ... + 1163823.

It is an arithmetic number, because the mean of its divisors is an integer number (136111599).

Almost surely, 2^1109832561 is an apocalyptic number.

It is an amenable number.

1109832561 is a deficient number, since it is larger than the sum of its proper divisors (523506627).

1109832561 is a wasteful number, since it uses less digits than its factorization.

1109832561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326752 (or 2326749 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1109832561 is about 33314.1495614101. The cubic root of 1109832561 is about 1035.3467409263.

The spelling of 1109832561 in words is "one billion, one hundred nine million, eight hundred thirty-two thousand, five hundred sixty-one".