3916955561 has 2 divisors, whose sum is σ = 3916955562. Its totient is φ = 3916955560.

The previous prime is 3916955551. The next prime is 3916955563. The reversal of 3916955561 is 1655596193.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3767627161 + 149328400 = 61381^2 + 12220^2 .

It is an emirp because it is prime and its reverse (1655596193) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3916955561 is a prime.

Together with 3916955563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3916955563) 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, 1958477780 + 1958477781.

It is an arithmetic number, because the mean of its divisors is an integer number (1958477781).

Almost surely, 2^3916955561 is an apocalyptic number.

It is an amenable number.

3916955561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3916955561 is an equidigital number, since it uses as much as digits as its factorization.

3916955561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1093500, while the sum is 50.

The square root of 3916955561 is about 62585.5858884456. The cubic root of 3916955561 is about 1576.3387372636.

The spelling of 3916955561 in words is "three billion, nine hundred sixteen million, nine hundred fifty-five thousand, five hundred sixty-one".