2099785525 has 24 divisors (see below), whose sum is σ = 2625854504. Its totient is φ = 1665619200.

The previous prime is 2099785517. The next prime is 2099785531. The reversal of 2099785525 is 5255879902.

It can be written as a sum of positive squares in 12 ways, for example, as 1794200164 + 305585361 = 42358^2 + 17481^2 .

It is not a de Polignac number, because 2099785525 - 2³ = 2099785517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2773447 + ... + 2774203.

Almost surely, 2^2099785525 is an apocalyptic number.

2099785525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2099785525 is a deficient number, since it is larger than the sum of its proper divisors (526068979).

2099785525 is a wasteful number, since it uses less digits than its factorization.

2099785525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 52.

The square root of 2099785525 is about 45823.4167757054. The cubic root of 2099785525 is about 1280.5355679134.

The spelling of 2099785525 in words is "two billion, ninety-nine million, seven hundred eighty-five thousand, five hundred twenty-five".