3958045561 has 2 divisors, whose sum is σ = 3958045562. Its totient is φ = 3958045560.

The previous prime is 3958045549. The next prime is 3958045583. The reversal of 3958045561 is 1655408593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3745440000 + 212605561 = 61200^2 + 14581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3958045561 is a prime.

It is a super-2 number, since 2×3958045561² = 31332249325903609442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3958045061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979022780 + 1979022781.

It is an arithmetic number, because the mean of its divisors is an integer number (1979022781).

Almost surely, 2^3958045561 is an apocalyptic number.

It is an amenable number.

3958045561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3958045561 is an equidigital number, since it uses as much as digits as its factorization.

3958045561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 3958045561 is about 62912.9999364201. Note that the first 4 decimals coincide. The cubic root of 3958045561 is about 1581.8316578932.

The spelling of 3958045561 in words is "three billion, nine hundred fifty-eight million, forty-five thousand, five hundred sixty-one".