4001568481 has 2 divisors, whose sum is σ = 4001568482. Its totient is φ = 4001568480.

The previous prime is 4001568479. The next prime is 4001568499. The reversal of 4001568481 is 1848651004.

4001568481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3904250256 + 97318225 = 62484^2 + 9865^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001568481 - 2¹ = 4001568479 is a prime.

It is a super-2 number, since 2×4001568481² = 32025100616265294722, which contains 22 as substring.

Together with 4001568479, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4001568481.

It is not a weakly prime, because it can be changed into another prime (4001568401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000784240 + 2000784241.

It is an arithmetic number, because the mean of its divisors is an integer number (2000784241).

Almost surely, 2^4001568481 is an apocalyptic number.

It is an amenable number.

4001568481 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001568481 is an equidigital number, since it uses as much as digits as its factorization.

4001568481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 4001568481 is about 63257.9519191066. The cubic root of 4001568481 is about 1587.6085088870.

The spelling of 4001568481 in words is "four billion, one million, five hundred sixty-eight thousand, four hundred eighty-one".