1115553312 has 72 divisors (see below), whose sum is σ = 3212576640. Its totient is φ = 367136640.

The previous prime is 1115553301. The next prime is 1115553331. The reversal of 1115553312 is 2133555111.

1115553312 is a `hidden beast` number, since 1 + 115 + 5 + 533 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1764 + ... + 47267.

It is an arithmetic number, because the mean of its divisors is an integer number (44619120).

Almost surely, 2^1115553312 is an apocalyptic number.

1115553312 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 1115553312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606288320).

1115553312 is an abundant number, since it is smaller than the sum of its proper divisors (2097023328).

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

1115553312 is a wasteful number, since it uses less digits than its factorization.

1115553312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49126 (or 49115 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1115553312 is about 33399.8998800895. The cubic root of 1115553312 is about 1037.1226283616.

The spelling of 1115553312 in words is "one billion, one hundred fifteen million, five hundred fifty-three thousand, three hundred twelve".