117781806393 has 12 divisors (see below), whose sum is σ = 170350520340. Its totient is φ = 78419091456.

The previous prime is 117781806391. The next prime is 117781806421. The reversal of 117781806393 is 393608187711.

117781806393 is a `hidden beast` number, since 1 + 1 + 7 + 78 + 180 + 6 + 393 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19469458089 + 98312348304 = 139533^2 + 313548^2 .

It is not a de Polignac number, because 117781806393 - 2¹ = 117781806391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117781806391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8502096 + ... + 8515937.

It is an arithmetic number, because the mean of its divisors is an integer number (14195876695).

Almost surely, 2^117781806393 is an apocalyptic number.

It is an amenable number.

117781806393 is a deficient number, since it is larger than the sum of its proper divisors (52568713947).

117781806393 is a wasteful number, since it uses less digits than its factorization.

117781806393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17018808 (or 17018805 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 117781806393 in words is "one hundred seventeen billion, seven hundred eighty-one million, eight hundred six thousand, three hundred ninety-three".