1939173221764 has 9 divisors (see below), whose sum is σ = 3393558011991. Its totient is φ = 969585218340.

The previous prime is 1939173221743. The next prime is 1939173221773. The reversal of 1939173221764 is 4671223719391.

The square root of 1939173221764 is 1392542.

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

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 2436949 + ... + 3133219.

Almost surely, 2^{1939173221764} is an apocalyptic number.

1939173221764 is the 1392542-nd square number.

It is an amenable number.

1939173221764 is a deficient number, since it is larger than the sum of its proper divisors (1454384790227).

1939173221764 is an frugal number, since it uses more digits than its factorization.

1939173221764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392546 (or 696273 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 55.

The spelling of 1939173221764 in words is "one trillion, nine hundred thirty-nine billion, one hundred seventy-three million, two hundred twenty-one thousand, seven hundred sixty-four".