4442257681 has 2 divisors, whose sum is σ = 4442257682. Its totient is φ = 4442257680.

The previous prime is 4442257657. The next prime is 4442257711. The reversal of 4442257681 is 1867522444.

4442257681 is digitally balanced in base 3, 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., 2348371600 + 2093886081 = 48460^2 + 45759^2 .

It is a cyclic number.

It is not a de Polignac number, because 4442257681 - 2¹¹ = 4442255633 is a prime.

It is a super-2 number, since 2×4442257681² = 39467306608806995522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4442257081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221128840 + 2221128841.

It is an arithmetic number, because the mean of its divisors is an integer number (2221128841).

Almost surely, 2^4442257681 is an apocalyptic number.

It is an amenable number.

4442257681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4442257681 is an equidigital number, since it uses as much as digits as its factorization.

4442257681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 43.

The square root of 4442257681 is about 66650.2639229583. The cubic root of 4442257681 is about 1643.8716875296.

The spelling of 4442257681 in words is "four billion, four hundred forty-two million, two hundred fifty-seven thousand, six hundred eighty-one".