2564355481 has 2 divisors, whose sum is σ = 2564355482. Its totient is φ = 2564355480.

The previous prime is 2564355419. The next prime is 2564355499. The reversal of 2564355481 is 1845534652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2548634256 + 15721225 = 50484^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564355481 - 2¹¹ = 2564353433 is a prime.

It is a super-2 number, since 2×2564355481² = 13151838065869482722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2564355401) 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, 1282177740 + 1282177741.

It is an arithmetic number, because the mean of its divisors is an integer number (1282177741).

Almost surely, 2^2564355481 is an apocalyptic number.

It is an amenable number.

2564355481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564355481 is an equidigital number, since it uses as much as digits as its factorization.

2564355481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576000, while the sum is 43.

The square root of 2564355481 is about 50639.4656468648. The cubic root of 2564355481 is about 1368.7561269202.

The spelling of 2564355481 in words is "two billion, five hundred sixty-four million, three hundred fifty-five thousand, four hundred eighty-one".