18050542479649 has 9 divisors (see below), whose sum is σ = 18256018813977. Its totient is φ = 17847353519424.

The previous prime is 18050542479643. The next prime is 18050542479689. The reversal of 18050542479649 is 94697424505081.

The square root of 18050542479649 is 4248593.

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 10902576629025 + 7147965850624 = 3301905^2 + 2673568^2 .

It is not a de Polignac number, because 18050542479649 - 2²⁹ = 18050005608737 is a prime.

It is a super-2 number, since 2×18050542479649² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18050542479643) 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, 378100909 + ... + 378148645.

Almost surely, 2^{18050542479649} is an apocalyptic number.

18050542479649 is the 4248593-rd square number.

18050542479649 is the 2124297-th centered octagonal number.

It is an amenable number.

18050542479649 is a deficient number, since it is larger than the sum of its proper divisors (205476334328).

18050542479649 is an frugal number, since it uses more digits than its factorization.

18050542479649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95652 (or 47826 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 18050542479649 in words is "eighteen trillion, fifty billion, five hundred forty-two million, four hundred seventy-nine thousand, six hundred forty-nine".