12512531645 has 8 divisors (see below), whose sum is σ = 15667865856. Its totient is φ = 9574806736.

The previous prime is 12512531623. The next prime is 12512531663. The reversal of 12512531645 is 54613521521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12512531645 - 2²⁴ = 12495754429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54402197 + ... + 54402426.

It is an arithmetic number, because the mean of its divisors is an integer number (1958483232).

Almost surely, 2^12512531645 is an apocalyptic number.

It is an amenable number.

12512531645 is a deficient number, since it is larger than the sum of its proper divisors (3155334211).

12512531645 is a wasteful number, since it uses less digits than its factorization.

12512531645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108804651.

The product of its digits is 36000, while the sum is 35.

The spelling of 12512531645 in words is "twelve billion, five hundred twelve million, five hundred thirty-one thousand, six hundred forty-five".