1644924242116 has 27 divisors (see below), whose sum is σ = 2887230367623. Its totient is φ = 820008610560.

The previous prime is 1644924242099. The next prime is 1644924242123. The reversal of 1644924242116 is 6112424294461.

The square root of 1644924242116 is 1282546.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 400575068100 + 1244349174016 = 632910^2 + 1115504^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 1110684096 + ... + 1110685576.

Almost surely, 2^{1644924242116} is an apocalyptic number.

1644924242116 is the 1282546-th square number.

It is an amenable number.

1644924242116 is a deficient number, since it is larger than the sum of its proper divisors (1242306125507).

1644924242116 is an frugal number, since it uses more digits than its factorization.

1644924242116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832 (or 1916 counting only the distinct ones).

The product of its digits is 663552, while the sum is 46.

The spelling of 1644924242116 in words is "one trillion, six hundred forty-four billion, nine hundred twenty-four million, two hundred forty-two thousand, one hundred sixteen".