449515270681 has 9 divisors (see below), whose sum is σ = 453750867423. Its totient is φ = 445318867800.

The previous prime is 449515270651. The next prime is 449515270709. The reversal of 449515270681 is 186072515944.

The square root of 449515270681 is 670459.

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

It can be written as a sum of positive squares in only one way, i.e., 313309987081 + 136205283600 = 559741^2 + 369060^2 .

It is not a de Polignac number, because 449515270681 - 2¹¹ = 449515268633 is a prime.

It is a super-2 number, since 2×449515270681² (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 (449515270601) 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, 73076956 + ... + 73083106.

It is an arithmetic number, because the mean of its divisors is an integer number (50416763047).

Almost surely, 2^449515270681 is an apocalyptic number.

449515270681 is the 670459-th square number.

449515270681 is the 335230-th centered octagonal number.

It is an amenable number.

449515270681 is a deficient number, since it is larger than the sum of its proper divisors (4235596742).

449515270681 is an frugal number, since it uses more digits than its factorization.

449515270681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12520 (or 6260 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 449515270681 in words is "four hundred forty-nine billion, five hundred fifteen million, two hundred seventy thousand, six hundred eighty-one".