1155323643455 has 32 divisors (see below), whose sum is σ = 1408659190848. Its totient is φ = 909529344000.

The previous prime is 1155323643451. The next prime is 1155323643493. The reversal of 1155323643455 is 5543463235511.

It is not a de Polignac number, because 1155323643455 - 2² = 1155323643451 is a prime.

It is a super-2 number, since 2×1155323643455² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155323643451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264798104 + ... + 264802466.

It is an arithmetic number, because the mean of its divisors is an integer number (44020599714).

Almost surely, 2^{1155323643455} is an apocalyptic number.

1155323643455 is a deficient number, since it is larger than the sum of its proper divisors (253335547393).

1155323643455 is a wasteful number, since it uses less digits than its factorization.

1155323643455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547.

The product of its digits is 3240000, while the sum is 47.

Adding to 1155323643455 its reverse (5543463235511), we get a palindrome (6698786878966).

The spelling of 1155323643455 in words is "one trillion, one hundred fifty-five billion, three hundred twenty-three million, six hundred forty-three thousand, four hundred fifty-five".