1153555155 has 16 divisors (see below), whose sum is σ = 2050764960. Its totient is φ = 615229344.

The previous prime is 1153555153. The next prime is 1153555163. The reversal of 1153555155 is 5515553511.

1153555155 is a `hidden beast` number, since 1 + 1 + 53 + 5 + 551 + 55 = 666.

It is not a de Polignac number, because 1153555155 - 2¹ = 1153555153 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1153555153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4272292 + ... + 4272561.

It is an arithmetic number, because the mean of its divisors is an integer number (128172810).

Almost surely, 2^1153555155 is an apocalyptic number.

1153555155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1153555155 is a deficient number, since it is larger than the sum of its proper divisors (897209805).

1153555155 is an equidigital number, since it uses as much as digits as its factorization.

1153555155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8544867 (or 8544861 counting only the distinct ones).

The product of its digits is 46875, while the sum is 36.

The square root of 1153555155 is about 33964.0273672013. The cubic root of 1153555155 is about 1048.7680653761.

The spelling of 1153555155 in words is "one billion, one hundred fifty-three million, five hundred fifty-five thousand, one hundred fifty-five".