11993165503225 has 27 divisors (see below), whose sum is σ = 14909907292749. Its totient is φ = 9569833466400.

The previous prime is 11993165503181. The next prime is 11993165503243. The reversal of 11993165503225 is 52230556139911.

It is a happy number.

The square root of 11993165503225 is 3463115.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5261091801849 + 6732073701376 = 2293707^2 + 2594624^2 .

It is not a de Polignac number, because 11993165503225 - 2⁷ = 11993165503097 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 26 ways as a sum of consecutive naturals, for example, 9887192719 + ... + 9887193931.

Almost surely, 2^{11993165503225} is an apocalyptic number.

11993165503225 is the 3463115-th square number.

11993165503225 is the 1731558-th centered octagonal number.

It is an amenable number.

11993165503225 is a deficient number, since it is larger than the sum of its proper divisors (2916741789524).

11993165503225 is an frugal number, since it uses more digits than its factorization.

11993165503225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 52.

The spelling of 11993165503225 in words is "eleven trillion, nine hundred ninety-three billion, one hundred sixty-five million, five hundred three thousand, two hundred twenty-five".