3181656804 has 12 divisors (see below), whose sum is σ = 7423865904. Its totient is φ = 1060552264.

The previous prime is 3181656781. The next prime is 3181656809. The reversal of 3181656804 is 4086561813.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (3181656809) 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 3 ways as a sum of consecutive naturals, for example, 132569022 + ... + 132569045.

It is an arithmetic number, because the mean of its divisors is an integer number (618655492).

Almost surely, 2^3181656804 is an apocalyptic number.

It is an amenable number.

3181656804 is an abundant number, since it is smaller than the sum of its proper divisors (4242209100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3181656804 is a wasteful number, since it uses less digits than its factorization.

3181656804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265138074 (or 265138072 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 3181656804 is about 56406.1770021688. The cubic root of 3181656804 is about 1470.7914974901.

The spelling of 3181656804 in words is "three billion, one hundred eighty-one million, six hundred fifty-six thousand, eight hundred four".