4897568521 has 2 divisors, whose sum is σ = 4897568522. Its totient is φ = 4897568520.

The previous prime is 4897568519. The next prime is 4897568591. The reversal of 4897568521 is 1258657984.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4517318521 + 380250000 = 67211^2 + 19500^2 .

It is a cyclic number.

It is not a de Polignac number, because 4897568521 - 2¹ = 4897568519 is a prime.

Together with 4897568519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4897568591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2448784260 + 2448784261.

It is an arithmetic number, because the mean of its divisors is an integer number (2448784261).

Almost surely, 2^4897568521 is an apocalyptic number.

It is an amenable number.

4897568521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4897568521 is an equidigital number, since it uses as much as digits as its factorization.

4897568521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 55.

The square root of 4897568521 is about 69982.6301377706. The cubic root of 4897568521 is about 1698.2182625439.

The spelling of 4897568521 in words is "four billion, eight hundred ninety-seven million, five hundred sixty-eight thousand, five hundred twenty-one".