3655644649 has 2 divisors, whose sum is σ = 3655644650. Its totient is φ = 3655644648.

The previous prime is 3655644637. The next prime is 3655644667. The reversal of 3655644649 is 9464465563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3624642025 + 31002624 = 60205^2 + 5568^2 .

It is a cyclic number.

It is not a de Polignac number, because 3655644649 - 2²⁹ = 3118773737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3655644596 and 3655644605.

It is not a weakly prime, because it can be changed into another prime (3655644689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827822324 + 1827822325.

It is an arithmetic number, because the mean of its divisors is an integer number (1827822325).

Almost surely, 2^3655644649 is an apocalyptic number.

It is an amenable number.

3655644649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655644649 is an equidigital number, since it uses as much as digits as its factorization.

3655644649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 52.

The square root of 3655644649 is about 60461.9272683232. The cubic root of 3655644649 is about 1540.4750107464.

The spelling of 3655644649 in words is "three billion, six hundred fifty-five million, six hundred forty-four thousand, six hundred forty-nine".