12345566788899 has 24 divisors (see below), whose sum is σ = 18254671015152. Its totient is φ = 8035679796480.

The previous prime is 12345566788883. The next prime is 12345566788939. The reversal of 12345566788899 is 99888766554321.

12345566788899 is a `hidden beast` number, since 1 + 2 + 3 + 45 + 566 + 7 + 8 + 8 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 12345566788899 - 2⁴ = 12345566788883 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12345566788829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5589682 + ... + 7479015.

It is an arithmetic number, because the mean of its divisors is an integer number (760611292298).

Almost surely, 2^{12345566788899} is an apocalyptic number.

12345566788899 is a deficient number, since it is larger than the sum of its proper divisors (5909104226253).

12345566788899 is a wasteful number, since it uses less digits than its factorization.

12345566788899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13071187 (or 13071184 counting only the distinct ones).

The product of its digits is 6270566400, while the sum is 81.

The spelling of 12345566788899 in words is "twelve trillion, three hundred forty-five billion, five hundred sixty-six million, seven hundred eighty-eight thousand, eight hundred ninety-nine".