12552012665 has 4 divisors (see below), whose sum is σ = 15062415204. Its totient is φ = 10041610128.

The previous prime is 12552012647. The next prime is 12552012677. The reversal of 12552012665 is 56621025521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56621025521 = 1693 ⋅33444197.

It can be written as a sum of positive squares in 2 ways, for example, as 8548666681 + 4003345984 = 92459^2 + 63272^2 .

It is a cyclic number.

It is not a de Polignac number, because 12552012665 - 2⁶ = 12552012601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255201262 + ... + 1255201271.

It is an arithmetic number, because the mean of its divisors is an integer number (3765603801).

Almost surely, 2^12552012665 is an apocalyptic number.

It is an amenable number.

12552012665 is a deficient number, since it is larger than the sum of its proper divisors (2510402539).

12552012665 is an equidigital number, since it uses as much as digits as its factorization.

12552012665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510402538.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 12552012665 in words is "twelve billion, five hundred fifty-two million, twelve thousand, six hundred sixty-five".