1109553312 has 96 divisors (see below), whose sum is σ = 3333947904. Its totient is φ = 316512000.

The previous prime is 1109553259. The next prime is 1109553323. The reversal of 1109553312 is 2133559011.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1109553312² = 2462217104340338688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1109553312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705487 + ... + 707057.

It is an arithmetic number, because the mean of its divisors is an integer number (34728624).

Almost surely, 2^1109553312 is an apocalyptic number.

1109553312 is a gapful number since it is divisible by the number (12) 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 1109553312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666973952).

1109553312 is an abundant number, since it is smaller than the sum of its proper divisors (2224394592).

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

1109553312 is a wasteful number, since it uses less digits than its factorization.

1109553312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642 (or 2634 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 1109553312 is about 33309.9581506792. The cubic root of 1109553312 is about 1035.2598978582.

The spelling of 1109553312 in words is "one billion, one hundred nine million, five hundred fifty-three thousand, three hundred twelve".