2644644644042 has 16 divisors (see below), whose sum is σ = 4104995673600. Its totient is φ = 1276340236080.

The previous prime is 2644644643987. The next prime is 2644644644123. The reversal of 2644644644042 is 2404464464462.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6676634 + ... + 7061637.

It is an arithmetic number, because the mean of its divisors is an integer number (256562229600).

Almost surely, 2^{2644644644042} is an apocalyptic number.

2644644644042 is a deficient number, since it is larger than the sum of its proper divisors (1460351029558).

2644644644042 is a wasteful number, since it uses less digits than its factorization.

2644644644042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13741621.

The product of its (nonzero) digits is 14155776, while the sum is 50.

The spelling of 2644644644042 in words is "two trillion, six hundred forty-four billion, six hundred forty-four million, six hundred forty-four thousand, forty-two".