11978161366 has 8 divisors (see below), whose sum is σ = 18023922000. Its totient is φ = 5970187368.

The previous prime is 11978161319. The next prime is 11978161411. The reversal of 11978161366 is 66316187911.

It is a sphenic number, since it is the product of 3 distinct 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 in 3 ways as a sum of consecutive naturals, for example, 9445866 + ... + 9447133.

It is an arithmetic number, because the mean of its divisors is an integer number (2252990250).

Almost surely, 2^11978161366 is an apocalyptic number.

11978161366 is a deficient number, since it is larger than the sum of its proper divisors (6045760634).

11978161366 is a wasteful number, since it uses less digits than its factorization.

11978161366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18893318.

The product of its digits is 326592, while the sum is 49.

The spelling of 11978161366 in words is "eleven billion, nine hundred seventy-eight million, one hundred sixty-one thousand, three hundred sixty-six".