1155503264 has 12 divisors (see below), whose sum is σ = 2274897114. Its totient is φ = 577751616.

The previous prime is 1155503257. The next prime is 1155503281. The reversal of 1155503264 is 4623055511.

It can be written as a sum of positive squares in only one way, i.e., 1151923600 + 3579664 = 33940^2 + 1892^2 .

It is a super-2 number, since 2×1155503264² = 2670375586229307392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 36109477 = 1155503264 / (1 + 1 + 5 + 5 + 5 + 0 + 3 + 2 + 6 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 1155503264.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18054707 + ... + 18054770.

Almost surely, 2^1155503264 is an apocalyptic number.

It is an amenable number.

1155503264 is a deficient number, since it is larger than the sum of its proper divisors (1119393850).

1155503264 is an equidigital number, since it uses as much as digits as its factorization.

1155503264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36109487 (or 36109479 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1155503264 is about 33992.6942739172. The cubic root of 1155503264 is about 1049.3581153180.

Adding to 1155503264 its reverse (4623055511), we get a palindrome (5778558775).

The spelling of 1155503264 in words is "one billion, one hundred fifty-five million, five hundred three thousand, two hundred sixty-four".