16805695275625 has 15 divisors (see below), whose sum is σ = 21000524884801. Its totient is φ = 13444474231000.

The previous prime is 16805695275619. The next prime is 16805695275637. The reversal of 16805695275625 is 52657259650861.

The square root of 16805695275625 is 4099475.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1317566509609 + 15488128766016 = 1147853^2 + 3935496^2 .

It is not a de Polignac number, because 16805695275625 - 2³ = 16805695275617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 102404886 + ... + 102568864.

Almost surely, 2^{16805695275625} is an apocalyptic number.

16805695275625 is the 4099475-th square number.

16805695275625 is the 2049738-th centered octagonal number.

It is an amenable number.

16805695275625 is a deficient number, since it is larger than the sum of its proper divisors (4194829609176).

16805695275625 is an frugal number, since it uses more digits than its factorization.

16805695275625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327978 (or 163984 counting only the distinct ones).

The product of its (nonzero) digits is 272160000, while the sum is 67.

The spelling of 16805695275625 in words is "sixteen trillion, eight hundred five billion, six hundred ninety-five million, two hundred seventy-five thousand, six hundred twenty-five".