117999281566 has 4 divisors (see below), whose sum is σ = 176998922352. Its totient is φ = 58999640782.

The previous prime is 117999281531. The next prime is 117999281573. The reversal of 117999281566 is 665182999711.

117999281566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 117999281498 and 117999281507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29499820390 + ... + 29499820393.

It is an arithmetic number, because the mean of its divisors is an integer number (44249730588).

Almost surely, 2^117999281566 is an apocalyptic number.

117999281566 is a deficient number, since it is larger than the sum of its proper divisors (58999640786).

117999281566 is an equidigital number, since it uses as much as digits as its factorization.

117999281566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58999640785.

The product of its digits is 14696640, while the sum is 64.

The spelling of 117999281566 in words is "one hundred seventeen billion, nine hundred ninety-nine million, two hundred eighty-one thousand, five hundred sixty-six".