12156165025 has 9 divisors (see below), whose sum is σ = 15074328243. Its totient is φ = 9724491000.

The previous prime is 12156164939. The next prime is 12156165031. The reversal of 12156165025 is 52056165121.

The square root of 12156165025 is 110255.

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

It can be written as a sum of positive squares in only one way, i.e., 4376219409 + 7779945616 = 66153^2 + 88204^2 .

It is not a de Polignac number, because 12156165025 - 2⁷ = 12156164897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 540250 + ... + 562300.

Almost surely, 2^12156165025 is an apocalyptic number.

12156165025 is the 110255-th square number.

12156165025 is the 55128-th centered octagonal number.

It is an amenable number.

12156165025 is a deficient number, since it is larger than the sum of its proper divisors (2918163218).

12156165025 is an frugal number, since it uses more digits than its factorization.

12156165025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44112 (or 22056 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 12156165025 in words is "twelve billion, one hundred fifty-six million, one hundred sixty-five thousand, twenty-five".