13456667785 has 32 divisors (see below), whose sum is σ = 18015436800. Its totient is φ = 9566631360.

The previous prime is 13456667779. The next prime is 13456667789. The reversal of 13456667785 is 58776665431.

It is not a de Polignac number, because 13456667785 - 2¹⁷ = 13456536713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13456667789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569272 + ... + 592438.

It is an arithmetic number, because the mean of its divisors is an integer number (562982400).

Almost surely, 2^13456667785 is an apocalyptic number.

It is an amenable number.

13456667785 is a deficient number, since it is larger than the sum of its proper divisors (4558769015).

13456667785 is a wasteful number, since it uses less digits than its factorization.

13456667785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23421.

The product of its digits is 25401600, while the sum is 58.

The spelling of 13456667785 in words is "thirteen billion, four hundred fifty-six million, six hundred sixty-seven thousand, seven hundred eighty-five".