11055055511 has 4 divisors (see below), whose sum is σ = 11705352912. Its totient is φ = 10404758112.

The previous prime is 11055055499. The next prime is 11055055553. The reversal of 11055055511 is 11555055011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11555055011 = 109 ⋅106009679.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11055055511 is a prime.

It is a super-2 number, since 2×11055055511² (a number of 21 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 (11055045511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325148675 + ... + 325148708.

It is an arithmetic number, because the mean of its divisors is an integer number (2926338228).

Almost surely, 2^11055055511 is an apocalyptic number.

11055055511 is a deficient number, since it is larger than the sum of its proper divisors (650297401).

11055055511 is an equidigital number, since it uses as much as digits as its factorization.

11055055511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650297400.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 11055055511 in words is "eleven billion, fifty-five million, fifty-five thousand, five hundred eleven".