12816399999999 has 32 divisors (see below), whose sum is σ = 18139440533760. Its totient is φ = 8026646400000.

The previous prime is 12816399999941. The next prime is 12816400000031. The reversal of 12816399999999 is 99999999361821.

It is a happy number.

It is a Cunningham number, because it is equal to 3580000²-1.

It is not a de Polignac number, because 12816399999999 - 2¹⁶ = 12816399934463 is a prime.

12816399999999 is a modest number, since divided by 9999999 gives 1281639 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816399998999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789999 + ... + 5369999.

It is an arithmetic number, because the mean of its divisors is an integer number (566857516680).

Almost surely, 2^{12816399999999} is an apocalyptic number.

12816399999999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12816399999999 is a deficient number, since it is larger than the sum of its proper divisors (5323040533761).

12816399999999 is a wasteful number, since it uses less digits than its factorization.

12816399999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580551.

The product of its digits is 12397455648, while the sum is 93.

The spelling of 12816399999999 in words is "twelve trillion, eight hundred sixteen billion, three hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".