3804256067561 has 8 divisors (see below), whose sum is σ = 3935482209480. Its totient is φ = 3673032918912.

The previous prime is 3804256067531. The next prime is 3804256067581. The reversal of 3804256067561 is 1657606524083.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56760203536 + 3747495864025 = 238244^2 + 1935845^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3804256067561 - 2²⁶ = 3804188958697 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 (3804256067531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009741 + ... + 3412853.

It is an arithmetic number, because the mean of its divisors is an integer number (491935276185).

Almost surely, 2^{3804256067561} is an apocalyptic number.

It is an amenable number.

3804256067561 is a deficient number, since it is larger than the sum of its proper divisors (131226141919).

3804256067561 is a wasteful number, since it uses less digits than its factorization.

3804256067561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496635.

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 3804256067561 in words is "three trillion, eight hundred four billion, two hundred fifty-six million, sixty-seven thousand, five hundred sixty-one".