9749862615529 has 9 divisors (see below), whose sum is σ = 9807089328453. Its totient is φ = 9692967962112.

The previous prime is 9749862615527. The next prime is 9749862615557. The reversal of 9749862615529 is 9255162689479.

The square root of 9749862615529 is 3122477.

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 5898267963225 + 3851594652304 = 2428635^2 + 1962548^2 .

It is not a de Polignac number, because 9749862615529 - 2¹ = 9749862615527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9749862615527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 540179497 + ... + 540197545.

Almost surely, 2^{9749862615529} is an apocalyptic number.

9749862615529 is the 3122477-th square number.

9749862615529 is the 1561239-th centered octagonal number.

It is an amenable number.

9749862615529 is a deficient number, since it is larger than the sum of its proper divisors (57226712924).

9749862615529 is an frugal number, since it uses more digits than its factorization.

9749862615529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36444 (or 18222 counting only the distinct ones).

The product of its digits is 587865600, while the sum is 73.

The spelling of 9749862615529 in words is "nine trillion, seven hundred forty-nine billion, eight hundred sixty-two million, six hundred fifteen thousand, five hundred twenty-nine".