11155411141550 has 72 divisors (see below), whose sum is σ = 22611032629416. Its totient is φ = 4092685384320.

The previous prime is 11155411141541. The next prime is 11155411141573. The reversal of 11155411141550 is 5514111455111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11155411141550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2877704 + ... + 5531003.

It is an arithmetic number, because the mean of its divisors is an integer number (314042119853).

Almost surely, 2^{11155411141550} is an apocalyptic number.

11155411141550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11155411141550 is an abundant number, since it is smaller than the sum of its proper divisors (11455621487866).

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

11155411141550 is a wasteful number, since it uses less digits than its factorization.

11155411141550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408902 (or 8408884 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 35.

Adding to 11155411141550 its reverse (5514111455111), we get a palindrome (16669522596661).

The spelling of 11155411141550 in words is "eleven trillion, one hundred fifty-five billion, four hundred eleven million, one hundred forty-one thousand, five hundred fifty".