12552920509 has 4 divisors (see below), whose sum is σ = 12644547804. Its totient is φ = 12461293216.

The previous prime is 12552920467. The next prime is 12552920533. The reversal of 12552920509 is 90502925521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2487814884 + 10065105625 = 49878^2 + 100325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12552920509 - 2¹⁵ = 12552887741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552920579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45813442 + ... + 45813715.

It is an arithmetic number, because the mean of its divisors is an integer number (3161136951).

Almost surely, 2^12552920509 is an apocalyptic number.

It is an amenable number.

12552920509 is a deficient number, since it is larger than the sum of its proper divisors (91627295).

12552920509 is an equidigital number, since it uses as much as digits as its factorization.

12552920509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91627294.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 12552920509 in words is "twelve billion, five hundred fifty-two million, nine hundred twenty thousand, five hundred nine".