4021444457 has 2 divisors, whose sum is σ = 4021444458. Its totient is φ = 4021444456.

The previous prime is 4021444439. The next prime is 4021444463. The reversal of 4021444457 is 7544441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3088691776 + 932752681 = 55576^2 + 30541^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021444457 - 2⁸ = 4021444201 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021444057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010722228 + 2010722229.

It is an arithmetic number, because the mean of its divisors is an integer number (2010722229).

Almost surely, 2^4021444457 is an apocalyptic number.

It is an amenable number.

4021444457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021444457 is an equidigital number, since it uses as much as digits as its factorization.

4021444457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 35.

The square root of 4021444457 is about 63414.8599068073. The cubic root of 4021444457 is about 1590.2327437731.

The spelling of 4021444457 in words is "four billion, twenty-one million, four hundred forty-four thousand, four hundred fifty-seven".