3555725409 has 12 divisors (see below), whose sum is σ = 5313153300. Its totient is φ = 2288742624.

The previous prime is 3555725359. The next prime is 3555725413. The reversal of 3555725409 is 9045275553.

3555725409 is a `hidden beast` number, since 3 + 55 + 57 + 2 + 540 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2360502225 + 1195223184 = 48585^2 + 34572^2 .

It is not a de Polignac number, because 3555725409 - 2⁸ = 3555725153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3555725429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6811474 + ... + 6811995.

It is an arithmetic number, because the mean of its divisors is an integer number (442762775).

Almost surely, 2^3555725409 is an apocalyptic number.

It is an amenable number.

3555725409 is a deficient number, since it is larger than the sum of its proper divisors (1757427891).

3555725409 is a wasteful number, since it uses less digits than its factorization.

3555725409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623504 (or 13623501 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The square root of 3555725409 is about 59629.9036474150. The cubic root of 3555725409 is about 1526.3099605579.

The spelling of 3555725409 in words is "three billion, five hundred fifty-five million, seven hundred twenty-five thousand, four hundred nine".