3943524760561 has 9 divisors (see below), whose sum is σ = 3952120231371. Its totient is φ = 3934947956472.

The previous prime is 3943524760541. The next prime is 3943524760589. The reversal of 3943524760561 is 1650674253493.

The square root of 3943524760561 is 1985831.

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., 51758525025 + 3891766235536 = 227505^2 + 1972756^2 .

It is not a de Polignac number, because 3943524760561 - 2²⁵ = 3943491206129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3943524760541) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 1038587715 + ... + 1038591511.

Almost surely, 2^{3943524760561} is an apocalyptic number.

3943524760561 is the 1985831-st square number.

3943524760561 is the 992916-th centered octagonal number.

It is an amenable number.

3943524760561 is a deficient number, since it is larger than the sum of its proper divisors (8595470810).

3943524760561 is an frugal number, since it uses more digits than its factorization.

3943524760561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640 (or 4320 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 55.

The spelling of 3943524760561 in words is "three trillion, nine hundred forty-three billion, five hundred twenty-four million, seven hundred sixty thousand, five hundred sixty-one".