12816205047 has 32 divisors (see below), whose sum is σ = 19684546560. Its totient is φ = 8235253440.

The previous prime is 12816205043. The next prime is 12816205097. The reversal of 12816205047 is 74050261821.

12816205047 is a `hidden beast` number, since 1 + 28 + 1 + 620 + 5 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 12816205047 - 2² = 12816205043 is a prime.

It is a super-2 number, since 2×12816205047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816205043) 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, 22138 + ... + 161624.

It is an arithmetic number, because the mean of its divisors is an integer number (615142080).

Almost surely, 2^12816205047 is an apocalyptic number.

12816205047 is a deficient number, since it is larger than the sum of its proper divisors (6868341513).

12816205047 is a wasteful number, since it uses less digits than its factorization.

12816205047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139620 (or 139614 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Adding to 12816205047 its reverse (74050261821), we get a palindrome (86866466868).

The spelling of 12816205047 in words is "twelve billion, eight hundred sixteen million, two hundred five thousand, forty-seven".