13133640686778 has 12 divisors (see below), whose sum is σ = 28456221488058. Its totient is φ = 4377880228920.

The previous prime is 13133640686767. The next prime is 13133640686813. The reversal of 13133640686778 is 87768604633131.

It is a happy number.

13133640686778 is a `hidden beast` number, since 13 + 133 + 6 + 406 + 86 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12544963520769 + 588677166009 = 3541887^2 + 767253^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364823352393 + ... + 364823352428.

Almost surely, 2^{13133640686778} is an apocalyptic number.

13133640686778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13133640686778 is an abundant number, since it is smaller than the sum of its proper divisors (15322580801280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13133640686778 is a wasteful number, since it uses less digits than its factorization.

13133640686778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729646704829 (or 729646704826 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 13133640686778 in words is "thirteen trillion, one hundred thirty-three billion, six hundred forty million, six hundred eighty-six thousand, seven hundred seventy-eight".