99787253273449 has 27 divisors (see below), whose sum is σ = 116279414557047. Its totient is φ = 85384548404064.

The previous prime is 99787253273431. The next prime is 99787253273471. The reversal of 99787253273449 is 94437235278799.

The square root of 99787253273449 is 9989357.

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., 5253791173225 + 94533462100224 = 2292115^2 + 9722832^2 .

It is not a de Polignac number, because 99787253273449 - 2¹⁹ = 99787252749161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99787253270449) 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, 65520191802 + ... + 65520193324.

Almost surely, 2^{99787253273449} is an apocalyptic number.

99787253273449 is the 9989357-th square number.

99787253273449 is the 4994679-th centered octagonal number.

It is an amenable number.

99787253273449 is a deficient number, since it is larger than the sum of its proper divisors (16492161283598).

99787253273449 is an frugal number, since it uses more digits than its factorization.

99787253273449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934 (or 2467 counting only the distinct ones).

The product of its digits is 5761082880, while the sum is 79.

The spelling of 99787253273449 in words is "ninety-nine trillion, seven hundred eighty-seven billion, two hundred fifty-three million, two hundred seventy-three thousand, four hundred forty-nine".