12405247550 has 48 divisors (see below), whose sum is σ = 23607447360. Its totient is φ = 4848629760.

The previous prime is 12405247549. The next prime is 12405247567. The reversal of 12405247550 is 5574250421.

It is a self number, because there is not a number n which added to its sum of digits gives 12405247550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366962 + ... + 399338.

It is an arithmetic number, because the mean of its divisors is an integer number (491821820).

Almost surely, 2^12405247550 is an apocalyptic number.

12405247550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12405247550 is a deficient number, since it is larger than the sum of its proper divisors (11202199810).

12405247550 is a wasteful number, since it uses less digits than its factorization.

12405247550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32565 (or 32560 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 35.

Adding to 12405247550 its reverse (5574250421), we get a palindrome (17979497971).

The spelling of 12405247550 in words is "twelve billion, four hundred five million, two hundred forty-seven thousand, five hundred fifty".