12015566463 has 24 divisors (see below), whose sum is σ = 16281676080. Its totient is φ = 7881892480.

The previous prime is 12015566461. The next prime is 12015566467. The reversal of 12015566463 is 36466551021.

It is not a de Polignac number, because 12015566463 - 2¹ = 12015566461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015566461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5806393 + ... + 5808461.

It is an arithmetic number, because the mean of its divisors is an integer number (678403170).

Almost surely, 2^12015566463 is an apocalyptic number.

12015566463 is a deficient number, since it is larger than the sum of its proper divisors (4266109617).

12015566463 is an equidigital number, since it uses as much as digits as its factorization.

12015566463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 12015566463 in words is "twelve billion, fifteen million, five hundred sixty-six thousand, four hundred sixty-three".