13105551404550 has 192 divisors, whose sum is σ = 36089612259840. Its totient is φ = 3120703488000.

The previous prime is 13105551404527. The next prime is 13105551404623. The reversal of 13105551404550 is 5540415550131.

It is a junction number, because it is equal to n+sod(n) for n = 13105551404499 and 13105551404508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31305414 + ... + 31721286.

It is an arithmetic number, because the mean of its divisors is an integer number (187966730520).

Almost surely, 2^{13105551404550} is an apocalyptic number.

13105551404550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13105551404550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18044806129920).

13105551404550 is an abundant number, since it is smaller than the sum of its proper divisors (22984060855290).

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

13105551404550 is a wasteful number, since it uses less digits than its factorization.

13105551404550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416239 (or 416234 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 39.

Adding to 13105551404550 its reverse (5540415550131), we get a palindrome (18645966954681).

The spelling of 13105551404550 in words is "thirteen trillion, one hundred five billion, five hundred fifty-one million, four hundred four thousand, five hundred fifty".