4393924476561 has 9 divisors (see below), whose sum is σ = 6346788882889. Its totient is φ = 2929278792036.

The previous prime is 4393924476439. The next prime is 4393924476581. The reversal of 4393924476561 is 1656744293934.

It is a happy number.

The square root of 4393924476561 is 2096169.

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

4393924476561 is a `hidden beast` number, since 4 + 3 + 9 + 3 + 9 + 24 + 47 + 6 + 561 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 4393924476561 - 2¹³ = 4393924468369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4393924476581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5939146 + ... + 6637868.

Almost surely, 2^{4393924476561} is an apocalyptic number.

4393924476561 is the 2096169-th square number.

4393924476561 is the 1048085-th centered octagonal number.

It is an amenable number.

4393924476561 is a deficient number, since it is larger than the sum of its proper divisors (1952864406328).

4393924476561 is an frugal number, since it uses more digits than its factorization.

4393924476561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397452 (or 698726 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 63.

The spelling of 4393924476561 in words is "four trillion, three hundred ninety-three billion, nine hundred twenty-four million, four hundred seventy-six thousand, five hundred sixty-one".