12813807778833 has 32 divisors (see below), whose sum is σ = 17345973206016. Its totient is φ = 8412760577088.

The previous prime is 12813807778831. The next prime is 12813807778873. The reversal of 12813807778833 is 33887770831821.

It is not a de Polignac number, because 12813807778833 - 2¹ = 12813807778831 is a prime.

It is a super-2 number, since 2×12813807778833² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12813807778831) 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, 312153516 + ... + 312194562.

It is an arithmetic number, because the mean of its divisors is an integer number (542061662688).

Almost surely, 2^{12813807778833} is an apocalyptic number.

It is an amenable number.

12813807778833 is a deficient number, since it is larger than the sum of its proper divisors (4532165427183).

12813807778833 is a wasteful number, since it uses less digits than its factorization.

12813807778833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45093.

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 12813807778833 in words is "twelve trillion, eight hundred thirteen billion, eight hundred seven million, seven hundred seventy-eight thousand, eight hundred thirty-three".