11055550055561 has 8 divisors (see below), whose sum is σ = 12258314816448. Its totient is φ = 9885737754000.

The previous prime is 11055550055519. The next prime is 11055550055597. The reversal of 11055550055561 is 16555005555011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11055550055561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11055550055761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8238114125 + ... + 8238115466.

It is an arithmetic number, because the mean of its divisors is an integer number (1532289352056).

Almost surely, 2^{11055550055561} is an apocalyptic number.

11055550055561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11055550055561 is a deficient number, since it is larger than the sum of its proper divisors (1202764760887).

11055550055561 is a wasteful number, since it uses less digits than its factorization.

11055550055561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16476229663.

The product of its (nonzero) digits is 468750, while the sum is 44.

Multiplying 11055550055561 by its sum of digits (44), we get a palindrome (486444202444684).

The spelling of 11055550055561 in words is "eleven trillion, fifty-five billion, five hundred fifty million, fifty-five thousand, five hundred sixty-one".