1155215635255 has 16 divisors (see below), whose sum is σ = 1524780495648. Its totient is φ = 840156820800.

The previous prime is 1155215635241. The next prime is 1155215635279. The reversal of 1155215635255 is 5525365125511.

It is a de Polignac number, because none of the positive numbers 2^k-1155215635255 is a prime.

It is a super-2 number, since 2×1155215635255² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86786406 + ... + 86799715.

It is an arithmetic number, because the mean of its divisors is an integer number (95298780978).

Almost surely, 2^{1155215635255} is an apocalyptic number.

1155215635255 is a deficient number, since it is larger than the sum of its proper divisors (369564860393).

1155215635255 is an equidigital number, since it uses as much as digits as its factorization.

1155215635255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173586159 (or 173586137 counting only the distinct ones).

The product of its digits is 1125000, while the sum is 46.

The spelling of 1155215635255 in words is "one trillion, one hundred fifty-five billion, two hundred fifteen million, six hundred thirty-five thousand, two hundred fifty-five".