3285553581 has 12 divisors (see below), whose sum is σ = 4835343708. Its totient is φ = 2149041024.

The previous prime is 3285553543. The next prime is 3285553633. The reversal of 3285553581 is 1853555823.

3285553581 is a `hidden beast` number, since 32 + 8 + 5 + 5 + 535 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2425070025 + 860483556 = 49245^2 + 29334^2 .

It is not a de Polignac number, because 3285553581 - 2⁹ = 3285553069 is a prime.

It is a super-2 number, since 2×3285553581² = 21589724667243847122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3285553681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3443500 + ... + 3444453.

It is an arithmetic number, because the mean of its divisors is an integer number (402945309).

Almost surely, 2^3285553581 is an apocalyptic number.

It is an amenable number.

3285553581 is a deficient number, since it is larger than the sum of its proper divisors (1549790127).

3285553581 is a wasteful number, since it uses less digits than its factorization.

3285553581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6888012 (or 6888009 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 3285553581 is about 57319.7486124983. The cubic root of 3285553581 is about 1486.6298589681.

It can be divided in two parts, 32855 and 53581, that added together give a square (86436 = 294²).

The spelling of 3285553581 in words is "three billion, two hundred eighty-five million, five hundred fifty-three thousand, five hundred eighty-one".