12516512629 has 4 divisors (see below), whose sum is σ = 12523838220. Its totient is φ = 12509187040.

The previous prime is 12516512587. The next prime is 12516512641. The reversal of 12516512629 is 92621561521.

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 1022528529 + 11493984100 = 31977^2 + 107210^2 .

It is a cyclic number.

It is not a de Polignac number, because 12516512629 - 2²³ = 12508124021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12516512591 and 12516512600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516542629) 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, 3660232 + ... + 3663649.

It is an arithmetic number, because the mean of its divisors is an integer number (3130959555).

Almost surely, 2^12516512629 is an apocalyptic number.

It is an amenable number.

12516512629 is a deficient number, since it is larger than the sum of its proper divisors (7325591).

12516512629 is an equidigital number, since it uses as much as digits as its factorization.

12516512629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7325590.

The product of its digits is 64800, while the sum is 40.

The spelling of 12516512629 in words is "twelve billion, five hundred sixteen million, five hundred twelve thousand, six hundred twenty-nine".