12512652639 has 4 divisors (see below), whose sum is σ = 16683536856. Its totient is φ = 8341768424.

The previous prime is 12512652631. The next prime is 12512652641. The reversal of 12512652639 is 93625621521.

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 12512652639 - 2³ = 12512652631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12512652639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512652631) 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, 2085442104 + ... + 2085442109.

It is an arithmetic number, because the mean of its divisors is an integer number (4170884214).

Almost surely, 2^12512652639 is an apocalyptic number.

12512652639 is a deficient number, since it is larger than the sum of its proper divisors (4170884217).

12512652639 is an equidigital number, since it uses as much as digits as its factorization.

12512652639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170884216.

The product of its digits is 194400, while the sum is 42.

The spelling of 12512652639 in words is "twelve billion, five hundred twelve million, six hundred fifty-two thousand, six hundred thirty-nine".