1155056505605 has 16 divisors (see below), whose sum is σ = 1400667985920. Its totient is φ = 914350151232.

The previous prime is 1155056505599. The next prime is 1155056505607. The reversal of 1155056505605 is 5065056505511.

It is a cyclic number.

It is not a de Polignac number, because 1155056505605 - 2¹² = 1155056501509 is a prime.

It is a super-2 number, since 2×1155056505605² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155056505607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2159054 + ... + 2640383.

It is an arithmetic number, because the mean of its divisors is an integer number (87541749120).

Almost surely, 2^{1155056505605} is an apocalyptic number.

It is an amenable number.

1155056505605 is a deficient number, since it is larger than the sum of its proper divisors (245611480315).

1155056505605 is a wasteful number, since it uses less digits than its factorization.

1155056505605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799948.

The product of its (nonzero) digits is 562500, while the sum is 44.

It can be divided in two parts, 1155056 and 505605, that added together give a palindrome (1660661).

The spelling of 1155056505605 in words is "one trillion, one hundred fifty-five billion, fifty-six million, five hundred five thousand, six hundred five".