11105105605550 has 96 divisors (see below), whose sum is σ = 22625534265984. Its totient is φ = 4021701264000.

The previous prime is 11105105605541. The next prime is 11105105605567. The reversal of 11105105605550 is 5550650150111.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11105105605550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292136045 + ... + 292174055.

It is an arithmetic number, because the mean of its divisors is an integer number (235682648604).

Almost surely, 2^{11105105605550} is an apocalyptic number.

11105105605550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11105105605550 is an abundant number, since it is smaller than the sum of its proper divisors (11520428660434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11105105605550 is a wasteful number, since it uses less digits than its factorization.

11105105605550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40194 (or 40189 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 35.

Adding to 11105105605550 its reverse (5550650150111), we get a palindrome (16655755755661).

The spelling of 11105105605550 in words is "eleven trillion, one hundred five billion, one hundred five million, six hundred five thousand, five hundred fifty".