12002644404538 has 16 divisors (see below), whose sum is σ = 18067613915520. Its totient is φ = 5980142181376.

The previous prime is 12002644404523. The next prime is 12002644404559. The reversal of 12002644404538 is 83540444620021.

It is a junction number, because it is equal to n+sod(n) for n = 12002644404494 and 12002644404503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8265031 + ... + 9608122.

It is an arithmetic number, because the mean of its divisors is an integer number (1129225869720).

Almost surely, 2^{12002644404538} is an apocalyptic number.

12002644404538 is a deficient number, since it is larger than the sum of its proper divisors (6064969510982).

12002644404538 is a wasteful number, since it uses less digits than its factorization.

12002644404538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17874341.

The product of its (nonzero) digits is 737280, while the sum is 43.

The spelling of 12002644404538 in words is "twelve trillion, two billion, six hundred forty-four million, four hundred four thousand, five hundred thirty-eight".