12404555540420 has 24 divisors (see below), whose sum is σ = 26065756613400. Its totient is φ = 4958738410752.

The previous prime is 12404555540417. The next prime is 12404555540437. The reversal of 12404555540420 is 2404555540421.

It can be written as a sum of positive squares in 4 ways, for example, as 8057797567876 + 4346757972544 = 2838626^2 + 2084888^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192704855 + ... + 192769214.

It is an arithmetic number, because the mean of its divisors is an integer number (1086073192225).

Almost surely, 2^{12404555540420} is an apocalyptic number.

12404555540420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12404555540420 is an abundant number, since it is smaller than the sum of its proper divisors (13661201072980).

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

12404555540420 is a wasteful number, since it uses less digits than its factorization.

12404555540420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385475687 (or 385475685 counting only the distinct ones).

The product of its (nonzero) digits is 640000, while the sum is 41.

Subtracting from 12404555540420 its reverse (2404555540421), we obtain a palindrome (9999999999999).

The spelling of 12404555540420 in words is "twelve trillion, four hundred four billion, five hundred fifty-five million, five hundred forty thousand, four hundred twenty".