99280837656529 has 3 divisors (see below), whose sum is σ = 99280847620507. Its totient is φ = 99280827692552.

The previous prime is 99280837656523. The next prime is 99280837656587. The reversal of 99280837656529 is 92565673808299.

The square root of 99280837656529 is 9963977.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 43280280500625 + 56000557155904 = 6578775^2 + 7483352^2 .

It is not a de Polignac number, because 99280837656529 - 2⁷ = 99280837656401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99280837656523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4981989 + ... + 14945965.

Almost surely, 2^{99280837656529} is an apocalyptic number.

99280837656529 is the 9963977-th square number.

99280837656529 is the 4981989-th centered octagonal number.

It is an amenable number.

99280837656529 is a deficient number, since it is larger than the sum of its proper divisors (9963978).

99280837656529 is an frugal number, since it uses more digits than its factorization.

99280837656529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19927954 (or 9963977 counting only the distinct ones).

The product of its (nonzero) digits is 3527193600, while the sum is 79.

The spelling of 99280837656529 in words is "ninety-nine trillion, two hundred eighty billion, eight hundred thirty-seven million, six hundred fifty-six thousand, five hundred twenty-nine".