1153205505 has 40 divisors (see below), whose sum is σ = 2070366144. Its totient is φ = 614109600.

The previous prime is 1153205497. The next prime is 1153205507. The reversal of 1153205505 is 5055023511.

1153205505 is a `hidden beast` number, since 1 + 153 + 2 + 0 + 5 + 505 = 666.

It is not a de Polignac number, because 1153205505 - 2³ = 1153205497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1153205507) 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 in 39 ways as a sum of consecutive naturals, for example, 326700 + ... + 330210.

Almost surely, 2^1153205505 is an apocalyptic number.

1153205505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1153205505 is a deficient number, since it is larger than the sum of its proper divisors (917160639).

1153205505 is an equidigital number, since it uses as much as digits as its factorization.

1153205505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4339 (or 4330 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 1153205505 is about 33958.8796193278. The cubic root of 1153205505 is about 1048.6620918823.

The spelling of 1153205505 in words is "one billion, one hundred fifty-three million, two hundred five thousand, five hundred five".