43661382120976 has 45 divisors (see below), whose sum is σ = 85007605080333. Its totient is φ = 21724452845760.

The previous prime is 43661382120959. The next prime is 43661382121043. The reversal of 43661382120976 is 67902128316634.

The square root of 43661382120976 is 6607676.

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., 5700996680976 + 37960385440000 = 2387676^2 + 6161200^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43661382120976.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5576874630 + ... + 5576882458.

Almost surely, 2^{43661382120976} is an apocalyptic number.

43661382120976 is the 6607676-th square number.

It is an amenable number.

43661382120976 is a deficient number, since it is larger than the sum of its proper divisors (41346222959357).

43661382120976 is an frugal number, since it uses more digits than its factorization.

43661382120976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16088 (or 8042 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 43661382120976 in words is "forty-three trillion, six hundred sixty-one billion, three hundred eighty-two million, one hundred twenty thousand, nine hundred seventy-six".