12456165213 has 24 divisors (see below), whose sum is σ = 18173937600. Its totient is φ = 8220366144.

The previous prime is 12456165167. The next prime is 12456165221. The reversal of 12456165213 is 31256165421.

12456165213 is a `hidden beast` number, since 1 + 24 + 5 + 616 + 5 + 2 + 13 = 666.

It is not a de Polignac number, because 12456165213 - 2¹² = 12456161117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456165713) 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, 1545448 + ... + 1553486.

It is an arithmetic number, because the mean of its divisors is an integer number (757247400).

Almost surely, 2^12456165213 is an apocalyptic number.

It is an amenable number.

12456165213 is a deficient number, since it is larger than the sum of its proper divisors (5717772387).

12456165213 is a wasteful number, since it uses less digits than its factorization.

12456165213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761 (or 9758 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 12456165213 in words is "twelve billion, four hundred fifty-six million, one hundred sixty-five thousand, two hundred thirteen".