4099381422561 has 6 divisors (see below), whose sum is σ = 5921328721490. Its totient is φ = 2732920948368.

The previous prime is 4099381422533. The next prime is 4099381422569. The reversal of 4099381422561 is 1652241839904.

It is a happy number.

4099381422561 is a `hidden beast` number, since 4 + 0 + 9 + 9 + 38 + 1 + 42 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2714111271936 + 1385270150625 = 1647456^2 + 1176975^2 .

It is not a de Polignac number, because 4099381422561 - 2¹³ = 4099381414369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4099381422498 and 4099381422507.

It is not an unprimeable number, because it can be changed into a prime (4099381422569) 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 5 ways as a sum of consecutive naturals, for example, 227743412356 + ... + 227743412373.

Almost surely, 2^{4099381422561} is an apocalyptic number.

It is an amenable number.

4099381422561 is a deficient number, since it is larger than the sum of its proper divisors (1821947298929).

4099381422561 is a wasteful number, since it uses less digits than its factorization.

4099381422561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455486824735 (or 455486824732 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 4099381422561 in words is "four trillion, ninety-nine billion, three hundred eighty-one million, four hundred twenty-two thousand, five hundred sixty-one".