9899819280325 has 24 divisors (see below), whose sum is σ = 13469501599848. Its totient is φ = 7172699239680.

The previous prime is 9899819280301. The next prime is 9899819280367. The reversal of 9899819280325 is 5230829189989.

It can be written as a sum of positive squares in 12 ways, for example, as 4301716587364 + 5598102692961 = 2074058^2 + 2366031^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9899819280325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287350534 + ... + 287384983.

It is an arithmetic number, because the mean of its divisors is an integer number (561229233327).

Almost surely, 2^{9899819280325} is an apocalyptic number.

It is an amenable number.

9899819280325 is a deficient number, since it is larger than the sum of its proper divisors (3569682319523).

9899819280325 is a wasteful number, since it uses less digits than its factorization.

9899819280325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574735593 (or 574735588 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 73.

The spelling of 9899819280325 in words is "nine trillion, eight hundred ninety-nine billion, eight hundred nineteen million, two hundred eighty thousand, three hundred twenty-five".