4063616521 has 2 divisors, whose sum is σ = 4063616522. Its totient is φ = 4063616520.

The previous prime is 4063616519. The next prime is 4063616567. The reversal of 4063616521 is 1256163604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3242163600 + 821452921 = 56940^2 + 28661^2 .

It is a cyclic number.

It is not a de Polignac number, because 4063616521 - 2¹ = 4063616519 is a prime.

Together with 4063616519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4063616581) 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, 2031808260 + 2031808261.

It is an arithmetic number, because the mean of its divisors is an integer number (2031808261).

Almost surely, 2^4063616521 is an apocalyptic number.

It is an amenable number.

4063616521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4063616521 is an equidigital number, since it uses as much as digits as its factorization.

4063616521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 4063616521 is about 63746.5020295232. The cubic root of 4063616521 is about 1595.7722397885.

The spelling of 4063616521 in words is "four billion, sixty-three million, six hundred sixteen thousand, five hundred twenty-one".