1452769785481 has 27 divisors (see below), whose sum is σ = 1699540631271. Its totient is φ = 1238209114464.

The previous prime is 1452769785469. The next prime is 1452769785497. The reversal of 1452769785481 is 1845879672541.

The square root of 1452769785481 is 1205309.

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., 295028217225 + 1157741568256 = 543165^2 + 1075984^2 .

It is not a de Polignac number, because 1452769785481 - 2⁹ = 1452769784969 is a prime.

It is a super-2 number, since 2×1452769785481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1452769735481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1965858610 + ... + 1965859348.

Almost surely, 2^{1452769785481} is an apocalyptic number.

1452769785481 is the 1205309-th square number.

1452769785481 is the 602655-th centered octagonal number.

It is an amenable number.

1452769785481 is a deficient number, since it is larger than the sum of its proper divisors (246770845790).

1452769785481 is an frugal number, since it uses more digits than its factorization.

1452769785481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 979 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 67.

The spelling of 1452769785481 in words is "one trillion, four hundred fifty-two billion, seven hundred sixty-nine million, seven hundred eighty-five thousand, four hundred eighty-one".