12528582949 has 4 divisors (see below), whose sum is σ = 12559826700. Its totient is φ = 12497339200.

The previous prime is 12528582877. The next prime is 12528582959. The reversal of 12528582949 is 94928582521.

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 6690094849 + 5838488100 = 81793^2 + 76410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12528582949 - 2¹³ = 12528574757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12528582949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12528582959) 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, 15621274 + ... + 15622075.

It is an arithmetic number, because the mean of its divisors is an integer number (3139956675).

Almost surely, 2^12528582949 is an apocalyptic number.

It is an amenable number.

12528582949 is a deficient number, since it is larger than the sum of its proper divisors (31243751).

12528582949 is an equidigital number, since it uses as much as digits as its factorization.

12528582949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31243750.

The product of its digits is 4147200, while the sum is 55.

The spelling of 12528582949 in words is "twelve billion, five hundred twenty-eight million, five hundred eighty-two thousand, nine hundred forty-nine".