1943938639504 has 15 divisors (see below), whose sum is σ = 3766391919523. Its totient is φ = 971966531248.

The previous prime is 1943938639441. The next prime is 1943938639543. The reversal of 1943938639504 is 4059368393491.

The square root of 1943938639504 is 1394252.

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 (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5402727 + ... + 5751289.

Almost surely, 2^{1943938639504} is an apocalyptic number.

1943938639504 is the 1394252-nd square number.

It is an amenable number.

1943938639504 is a deficient number, since it is larger than the sum of its proper divisors (1822453280019).

1943938639504 is an frugal number, since it uses more digits than its factorization.

1943938639504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697134 (or 348565 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 64.

Multiplying 1943938639504 by its sum of digits (64), we get a square (124412072928256 = 11154016²).

The spelling of 1943938639504 in words is "one trillion, nine hundred forty-three billion, nine hundred thirty-eight million, six hundred thirty-nine thousand, five hundred four".