12816812437 has 16 divisors (see below), whose sum is σ = 15111919872. Its totient is φ = 10716505920.

The previous prime is 12816812423. The next prime is 12816812461. The reversal of 12816812437 is 73421861821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12816812437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12816812393 and 12816812402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816812497) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 122173 + ... + 201394.

It is an arithmetic number, because the mean of its divisors is an integer number (944494992).

Almost surely, 2^12816812437 is an apocalyptic number.

It is an amenable number.

12816812437 is a deficient number, since it is larger than the sum of its proper divisors (2295107435).

12816812437 is a wasteful number, since it uses less digits than its factorization.

12816812437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323868.

The product of its digits is 129024, while the sum is 43.

The spelling of 12816812437 in words is "twelve billion, eight hundred sixteen million, eight hundred twelve thousand, four hundred thirty-seven".