43921317363856 has 15 divisors (see below), whose sum is σ = 85097603754201. Its totient is φ = 21960645427296.

The previous prime is 43921317363851. The next prime is 43921317363919. The reversal of 43921317363856 is 65836371312934.

The square root of 43921317363856 is 6627316.

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

It can be written as a sum of positive squares in only one way, i.e., 19185416173456 + 24735901190400 = 4380116^2 + 4973520^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43921317363794 and 43921317363803.

It is not an unprimeable number, because it can be changed into a prime (43921317363851) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25680850 + ... + 27337678.

Almost surely, 2^{43921317363856} is an apocalyptic number.

43921317363856 is the 6627316-th square number.

It is an amenable number.

43921317363856 is a deficient number, since it is larger than the sum of its proper divisors (41176286390345).

43921317363856 is an frugal number, since it uses more digits than its factorization.

43921317363856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313666 (or 1656831 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 61.

The spelling of 43921317363856 in words is "forty-three trillion, nine hundred twenty-one billion, three hundred seventeen million, three hundred sixty-three thousand, eight hundred fifty-six".