1155156255 has 128 divisors (see below), whose sum is σ = 2415329280. Its totient is φ = 517968000.

The previous prime is 1155156251. The next prime is 1155156283. The reversal of 1155156255 is 5526515511.

1155156255 is a `hidden beast` number, since 1 + 1 + 551 + 56 + 2 + 55 = 666.

It is not a de Polignac number, because 1155156255 - 2² = 1155156251 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155156251) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1058260 + ... + 1059350.

It is an arithmetic number, because the mean of its divisors is an integer number (18869760).

Almost surely, 2^1155156255 is an apocalyptic number.

1155156255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155156255 is an abundant number, since it is smaller than the sum of its proper divisors (1260173025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155156255 is a wasteful number, since it uses less digits than its factorization.

1155156255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1164 counting only the distinct ones).

The product of its digits is 37500, while the sum is 36.

The square root of 1155156255 is about 33987.5897203671. The cubic root of 1155156255 is about 1049.2530606118.

The spelling of 1155156255 in words is "one billion, one hundred fifty-five million, one hundred fifty-six thousand, two hundred fifty-five".