12565132067 has 4 divisors (see below), whose sum is σ = 12676328040. Its totient is φ = 12453936096.

The previous prime is 12565132049. The next prime is 12565132103. The reversal of 12565132067 is 76023156521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12565132067 - 2²⁰ = 12564083491 is a prime.

It is a super-2 number, since 2×12565132067² (a number of 21 digits) contains 22 as substring.

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 12565132067.

It is not an unprimeable number, because it can be changed into a prime (12565122067) 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, 55597817 + ... + 55598042.

It is an arithmetic number, because the mean of its divisors is an integer number (3169082010).

Almost surely, 2^12565132067 is an apocalyptic number.

12565132067 is a deficient number, since it is larger than the sum of its proper divisors (111195973).

12565132067 is a wasteful number, since it uses less digits than its factorization.

12565132067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111195972.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 12565132067 its reverse (76023156521), we get a palindrome (88588288588).

The spelling of 12565132067 in words is "twelve billion, five hundred sixty-five million, one hundred thirty-two thousand, sixty-seven".