1155161755 has 8 divisors (see below), whose sum is σ = 1512211824. Its totient is φ = 840117600.

The previous prime is 1155161741. The next prime is 1155161797. The reversal of 1155161755 is 5571615511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155161755 - 2¹⁵ = 1155128987 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10501416 + ... + 10501525.

It is an arithmetic number, because the mean of its divisors is an integer number (189026478).

Almost surely, 2^1155161755 is an apocalyptic number.

1155161755 is a deficient number, since it is larger than the sum of its proper divisors (357050069).

1155161755 is a wasteful number, since it uses less digits than its factorization.

1155161755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002957.

The product of its digits is 26250, while the sum is 37.

The square root of 1155161755 is about 33987.6706321572. The cubic root of 1155161755 is about 1049.2547258649.

The spelling of 1155161755 in words is "one billion, one hundred fifty-five million, one hundred sixty-one thousand, seven hundred fifty-five".