12556361421442 has 8 divisors (see below), whose sum is σ = 19653435268416. Its totient is φ = 6005216331972.

The previous prime is 12556361421437. The next prime is 12556361421563. The reversal of 12556361421442 is 24412416365521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 272964378727 = 12556361421442 / (1 + 2 + 5 + 5 + 6 + 3 + 6 + 1 + 4 + 2 + 1 + 4 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 12556361421392 and 12556361421401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136482189318 + ... + 136482189409.

It is an arithmetic number, because the mean of its divisors is an integer number (2456679408552).

Almost surely, 2^{12556361421442} is an apocalyptic number.

12556361421442 is a deficient number, since it is larger than the sum of its proper divisors (7097073846974).

12556361421442 is a wasteful number, since it uses less digits than its factorization.

12556361421442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272964378752.

The product of its digits is 1382400, while the sum is 46.

Adding to 12556361421442 its reverse (24412416365521), we get a palindrome (36968777786963).

The spelling of 12556361421442 in words is "twelve trillion, five hundred fifty-six billion, three hundred sixty-one million, four hundred twenty-one thousand, four hundred forty-two".