3655445561 has 2 divisors, whose sum is σ = 3655445562. Its totient is φ = 3655445560.

The previous prime is 3655445551. The next prime is 3655445567. The reversal of 3655445561 is 1655445563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2900899600 + 754545961 = 53860^2 + 27469^2 .

It is a cyclic number.

It is not a de Polignac number, because 3655445561 - 2¹⁴ = 3655429177 is a prime.

It is not a weakly prime, because it can be changed into another prime (3655445567) 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 as a sum of consecutive naturals, namely, 1827722780 + 1827722781.

It is an arithmetic number, because the mean of its divisors is an integer number (1827722781).

Almost surely, 2^3655445561 is an apocalyptic number.

It is an amenable number.

3655445561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655445561 is an equidigital number, since it uses as much as digits as its factorization.

3655445561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080000, while the sum is 44.

The square root of 3655445561 is about 60460.2808544585. The cubic root of 3655445561 is about 1540.4470452586.

The spelling of 3655445561 in words is "three billion, six hundred fifty-five million, four hundred forty-five thousand, five hundred sixty-one".