1155544816 has 20 divisors (see below), whose sum is σ = 2252608552. Its totient is φ = 574226496.

The previous prime is 1155544811. The next prime is 1155544823. The reversal of 1155544816 is 6184455511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155544811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218931 + ... + 224146.

Almost surely, 2^1155544816 is an apocalyptic number.

1155544816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1155544816 is a deficient number, since it is larger than the sum of its proper divisors (1097063736).

1155544816 is a wasteful number, since it uses less digits than its factorization.

1155544816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443248 (or 443242 counting only the distinct ones).

The product of its digits is 96000, while the sum is 40.

The square root of 1155544816 is about 33993.3054585752. The cubic root of 1155544816 is about 1049.3706935042.

The spelling of 1155544816 in words is "one billion, one hundred fifty-five million, five hundred forty-four thousand, eight hundred sixteen".