244242535681 has 25 divisors (see below), whose sum is σ = 264972886981. Its totient is φ = 225133944696.

The previous prime is 244242535661. The next prime is 244242535703. The reversal of 244242535681 is 186535242442.

The square root of 244242535681 is 494209.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 152288038081 + 91954497600 = 390241^2 + 303240^2 .

It is not a de Polignac number, because 244242535681 - 2⁷ = 244242535553 is a prime.

It is a super-2 number, since 2×244242535681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244242535651) by changing a digit.

It is a polite number, since it can be written in 24 ways as a sum of consecutive naturals, for example, 6601149595 + ... + 6601149631.

Almost surely, 2^244242535681 is an apocalyptic number.

244242535681 is the 494209-th square number.

244242535681 is the 247105-th centered octagonal number.

It is an amenable number.

244242535681 is a deficient number, since it is larger than the sum of its proper divisors (20730351300).

244242535681 is an frugal number, since it uses more digits than its factorization.

244242535681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 56 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 46.

The spelling of 244242535681 in words is "two hundred forty-four billion, two hundred forty-two million, five hundred thirty-five thousand, six hundred eighty-one".