1155400055 has 8 divisors (see below), whose sum is σ = 1446761952. Its totient is φ = 884132128.

The previous prime is 1155400003. The next prime is 1155400063. The reversal of 1155400055 is 5500045511.

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

It is a cyclic number.

It is not a de Polignac number, because 1155400055 - 2⁸ = 1155399799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155399997 and 1155400033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5023364 + ... + 5023593.

It is an arithmetic number, because the mean of its divisors is an integer number (180845244).

Almost surely, 2^1155400055 is an apocalyptic number.

1155400055 is a deficient number, since it is larger than the sum of its proper divisors (291361897).

1155400055 is a wasteful number, since it uses less digits than its factorization.

1155400055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10046985.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1155400055 is about 33991.1761344029. The cubic root of 1155400055 is about 1049.3268716658.

Adding to 1155400055 its reverse (5500045511), we get a palindrome (6655445566).

The spelling of 1155400055 in words is "one billion, one hundred fifty-five million, four hundred thousand, fifty-five".