12340135505550 has 48 divisors (see below), whose sum is σ = 30608134346880. Its totient is φ = 3290208361440.

The previous prime is 12340135505497. The next prime is 12340135505557. The reversal of 12340135505550 is 5550553104321.

12340135505550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12340135505499 and 12340135505508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340135505557) 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, 5178322 + ... + 7176021.

It is an arithmetic number, because the mean of its divisors is an integer number (637669465560).

Almost surely, 2^{12340135505550} is an apocalyptic number.

12340135505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12340135505550 is an abundant number, since it is smaller than the sum of its proper divisors (18267998841330).

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

12340135505550 is a wasteful number, since it uses less digits than its factorization.

12340135505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12361017 (or 12361012 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 39.

Adding to 12340135505550 its reverse (5550553104321), we get a palindrome (17890688609871).

The spelling of 12340135505550 in words is "twelve trillion, three hundred forty billion, one hundred thirty-five million, five hundred five thousand, five hundred fifty".