12508836469 has 4 divisors (see below), whose sum is σ = 12637793644. Its totient is φ = 12379879296.

The previous prime is 12508836463. The next prime is 12508836491. The reversal of 12508836469 is 96463880521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96463880521 = 17 ⋅5674345913.

It can be written as a sum of positive squares in 2 ways, for example, as 5919455844 + 6589380625 = 76938^2 + 81175^2 .

It is a cyclic number.

It is not a de Polignac number, because 12508836469 - 2¹¹ = 12508834421 is a prime.

It is a super-2 number, since 2×12508836469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508836463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64478442 + ... + 64478635.

It is an arithmetic number, because the mean of its divisors is an integer number (3159448411).

Almost surely, 2^12508836469 is an apocalyptic number.

It is an amenable number.

12508836469 is a deficient number, since it is larger than the sum of its proper divisors (128957175).

12508836469 is an equidigital number, since it uses as much as digits as its factorization.

12508836469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128957174.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 12508836469 in words is "twelve billion, five hundred eight million, eight hundred thirty-six thousand, four hundred sixty-nine".