4050568721 has 2 divisors, whose sum is σ = 4050568722. Its totient is φ = 4050568720.

The previous prime is 4050568681. The next prime is 4050568727. The reversal of 4050568721 is 1278650504.

4050568721 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2399040400 + 1651528321 = 48980^2 + 40639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4050568721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4050568727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2025284360 + 2025284361.

It is an arithmetic number, because the mean of its divisors is an integer number (2025284361).

Almost surely, 2^4050568721 is an apocalyptic number.

It is an amenable number.

4050568721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4050568721 is an equidigital number, since it uses as much as digits as its factorization.

4050568721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 4050568721 is about 63644.0784441098. The cubic root of 4050568721 is about 1594.0624621637.

The spelling of 4050568721 in words is "four billion, fifty million, five hundred sixty-eight thousand, seven hundred twenty-one".