12440436556 has 12 divisors (see below), whose sum is σ = 21772191168. Its totient is φ = 6219810512.

The previous prime is 12440436529. The next prime is 12440436557. The reversal of 12440436556 is 65563404421.

It is a super-2 number, since 2×12440436556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12440436557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27211 + ... + 160066.

It is an arithmetic number, because the mean of its divisors is an integer number (1814349264).

Almost surely, 2^12440436556 is an apocalyptic number.

It is an amenable number.

12440436556 is a deficient number, since it is larger than the sum of its proper divisors (9331754612).

12440436556 is a wasteful number, since it uses less digits than its factorization.

12440436556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203888 (or 203886 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

It can be divided in two parts, 124404365 and 56, that added together give a palindrome (124404421).

The spelling of 12440436556 in words is "twelve billion, four hundred forty million, four hundred thirty-six thousand, five hundred fifty-six".