1181132864 has 14 divisors (see below), whose sum is σ = 2343810654. Its totient is φ = 590566400.

The previous prime is 1181132857. The next prime is 1181132867. The reversal of 1181132864 is 4682311811.

It can be written as a sum of positive squares in only one way, i.e., 635443264 + 545689600 = 25208^2 + 23360^2 .

It is not an unprimeable number, because it can be changed into a prime (1181132867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9227537 + ... + 9227664.

Almost surely, 2^1181132864 is an apocalyptic number.

It is an amenable number.

1181132864 is a deficient number, since it is larger than the sum of its proper divisors (1162677790).

1181132864 is an equidigital number, since it uses as much as digits as its factorization.

1181132864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18455213 (or 18455203 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 1181132864 is about 34367.6135918687. The cubic root of 1181132864 is about 1057.0598671781.

The spelling of 1181132864 in words is "one billion, one hundred eighty-one million, one hundred thirty-two thousand, eight hundred sixty-four".