1155207663 has 56 divisors (see below), whose sum is σ = 1827321120. Its totient is φ = 728844480.

The previous prime is 1155207601. The next prime is 1155207707. The reversal of 1155207663 is 3667025511.

1155207663 is a `hidden beast` number, since 1 + 1 + 5 + 520 + 76 + 63 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1155207663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155207863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1119958 + ... + 1120988.

Almost surely, 2^1155207663 is an apocalyptic number.

1155207663 is a deficient number, since it is larger than the sum of its proper divisors (672113457).

1155207663 is an equidigital number, since it uses as much as digits as its factorization.

1155207663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 1155207663 is about 33988.3459880001. The cubic root of 1155207663 is about 1049.2686253752.

The spelling of 1155207663 in words is "one billion, one hundred fifty-five million, two hundred seven thousand, six hundred sixty-three".