7449243481 has 9 divisors (see below), whose sum is σ = 7914769149. Its totient is φ = 7009671744.

The previous prime is 7449243479. The next prime is 7449243499. The reversal of 7449243481 is 1843429447.

The square root of 7449243481 is 86309.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4659291081 + 2789952400 = 68259^2 + 52820^2 .

It is not a de Polignac number, because 7449243481 - 2¹ = 7449243479 is a prime.

It is a super-2 number, since 2×7449243481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7449243881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1464715 + ... + 1469791.

Almost surely, 2^7449243481 is an apocalyptic number.

7449243481 is the 86309-th square number.

7449243481 is the 43155-th centered octagonal number.

It is an amenable number.

7449243481 is a deficient number, since it is larger than the sum of its proper divisors (465525668).

7449243481 is an frugal number, since it uses more digits than its factorization.

7449243481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10188 (or 5094 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The cubic root of 7449243481 is about 1953.0081540376.

The spelling of 7449243481 in words is "seven billion, four hundred forty-nine million, two hundred forty-three thousand, four hundred eighty-one".