1944317894544 has 105 divisors (see below), whose sum is σ = 5648527622539. Its totient is φ = 648055766880.

The previous prime is 1944317894539. The next prime is 1944317894551. The reversal of 1944317894544 is 4454987134491.

It is a happy number.

The square root of 1944317894544 is 1394388.

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

1944317894544 is a `hidden beast` number, since 1 + 9 + 4 + 4 + 3 + 1 + 7 + 89 + 4 + 544 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 150587449 + ... + 150600359.

Almost surely, 2^{1944317894544} is an apocalyptic number.

1944317894544 is the 1394388-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1944317894544

1944317894544 is an abundant number, since it is smaller than the sum of its proper divisors (3704209727995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1944317894544 is an frugal number, since it uses more digits than its factorization.

1944317894544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25848 (or 12916 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 1944317894544 in words is "one trillion, nine hundred forty-four billion, three hundred seventeen million, eight hundred ninety-four thousand, five hundred forty-four".