4442435681 has 2 divisors, whose sum is σ = 4442435682. Its totient is φ = 4442435680.

The previous prime is 4442435653. The next prime is 4442435761. The reversal of 4442435681 is 1865342444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3301077025 + 1141358656 = 57455^2 + 33784^2 .

It is a cyclic number.

It is not a de Polignac number, because 4442435681 - 2⁶ = 4442435617 is a prime.

It is a super-2 number, since 2×4442435681² = 39470469559643867522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4442435381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221217840 + 2221217841.

It is an arithmetic number, because the mean of its divisors is an integer number (2221217841).

Almost surely, 2^4442435681 is an apocalyptic number.

It is an amenable number.

4442435681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4442435681 is an equidigital number, since it uses as much as digits as its factorization.

4442435681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 41.

The square root of 4442435681 is about 66651.5992381278. The cubic root of 4442435681 is about 1643.8936437265.

The spelling of 4442435681 in words is "four billion, four hundred forty-two million, four hundred thirty-five thousand, six hundred eighty-one".