2563905481 has 2 divisors, whose sum is σ = 2563905482. Its totient is φ = 2563905480.

The previous prime is 2563905469. The next prime is 2563905497. The reversal of 2563905481 is 1845093652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2531699856 + 32205625 = 50316^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563905481 - 2¹³ = 2563897289 is a prime.

It is a super-2 number, since 2×2563905481² = 13147222631003682722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2563975481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281952740 + 1281952741.

It is an arithmetic number, because the mean of its divisors is an integer number (1281952741).

Almost surely, 2^2563905481 is an apocalyptic number.

It is an amenable number.

2563905481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563905481 is an equidigital number, since it uses as much as digits as its factorization.

2563905481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2563905481 is about 50635.0222770762. The cubic root of 2563905481 is about 1368.6760579003.

The spelling of 2563905481 in words is "two billion, five hundred sixty-three million, nine hundred five thousand, four hundred eighty-one".