11055551555565 has 24 divisors (see below), whose sum is σ = 20905042942368. Its totient is φ = 5360267420640.

The previous prime is 11055551555549. The next prime is 11055551555569. The reversal of 11055551555565 is 56555515555011.

11055551555565 is a `hidden beast` number, since 1 + 10 + 5 + 5 + 5 + 5 + 15 + 55 + 565 = 666.

It is not a de Polignac number, because 11055551555565 - 2⁴ = 11055551555549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11055551555569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11167223299 + ... + 11167224288.

It is an arithmetic number, because the mean of its divisors is an integer number (871043455932).

Almost surely, 2^{11055551555565} is an apocalyptic number.

11055551555565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11055551555565 is a deficient number, since it is larger than the sum of its proper divisors (9849491386803).

11055551555565 is a wasteful number, since it uses less digits than its factorization.

11055551555565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22334447609 (or 22334447606 counting only the distinct ones).

The product of its (nonzero) digits is 11718750, while the sum is 54.

The spelling of 11055551555565 in words is "eleven trillion, fifty-five billion, five hundred fifty-one million, five hundred fifty-five thousand, five hundred sixty-five".