1178921396806 has 4 divisors (see below), whose sum is σ = 1768382095212. Its totient is φ = 589460698402.

The previous prime is 1178921396791. The next prime is 1178921396857. The reversal of 1178921396806 is 6086931298711.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 294730349200 + ... + 294730349203.

It is an arithmetic number, because the mean of its divisors is an integer number (442095523803).

Almost surely, 2^{1178921396806} is an apocalyptic number.

1178921396806 is a deficient number, since it is larger than the sum of its proper divisors (589460698406).

1178921396806 is an equidigital number, since it uses as much as digits as its factorization.

1178921396806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589460698405.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 1178921396806 in words is "one trillion, one hundred seventy-eight billion, nine hundred twenty-one million, three hundred ninety-six thousand, eight hundred six".