3549228561 has 12 divisors (see below), whose sum is σ = 5129063940. Its totient is φ = 2365044480.

The previous prime is 3549228541. The next prime is 3549228563. The reversal of 3549228561 is 1658229453.

3549228561 is a `hidden beast` number, since 3 + 549 + 22 + 85 + 6 + 1 = 666.

3549228561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 870545025 + 2678683536 = 29505^2 + 51756^2 .

It is not a de Polignac number, because 3549228561 - 2⁷ = 3549228433 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3549228563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71796 + ... + 110693.

It is an arithmetic number, because the mean of its divisors is an integer number (427421995).

Almost surely, 2^3549228561 is an apocalyptic number.

It is an amenable number.

3549228561 is a deficient number, since it is larger than the sum of its proper divisors (1579835379).

3549228561 is a wasteful number, since it uses less digits than its factorization.

3549228561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184656 (or 184653 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 3549228561 is about 59575.4023150495. The cubic root of 3549228561 is about 1525.3797941100.

The spelling of 3549228561 in words is "three billion, five hundred forty-nine million, two hundred twenty-eight thousand, five hundred sixty-one".