3188808649 has 4 divisors (see below), whose sum is σ = 3434101636. Its totient is φ = 2943515664.

The previous prime is 3188808617. The next prime is 3188808659. The reversal of 3188808649 is 9468088813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 744198400 + 2444610249 = 27280^2 + 49443^2 .

It is a cyclic number.

It is not a de Polignac number, because 3188808649 - 2⁵ = 3188808617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3188808649.

It is not an unprimeable number, because it can be changed into a prime (3188808659) 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, 122646474 + ... + 122646499.

It is an arithmetic number, because the mean of its divisors is an integer number (858525409).

Almost surely, 2^3188808649 is an apocalyptic number.

It is an amenable number.

3188808649 is a deficient number, since it is larger than the sum of its proper divisors (245292987).

3188808649 is a wasteful number, since it uses less digits than its factorization.

3188808649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245292986.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The square root of 3188808649 is about 56469.5373542231. The cubic root of 3188808649 is about 1471.8927058356.

The spelling of 3188808649 in words is "three billion, one hundred eighty-eight million, eight hundred eight thousand, six hundred forty-nine".