11819123978 has 8 divisors (see below), whose sum is σ = 17743091520. Its totient is φ = 5904760140.

The previous prime is 11819123977. The next prime is 11819123989. The reversal of 11819123978 is 87932191811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11819123977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2397848 + ... + 2402771.

It is an arithmetic number, because the mean of its divisors is an integer number (2217886440).

Almost surely, 2^11819123978 is an apocalyptic number.

11819123978 is a deficient number, since it is larger than the sum of its proper divisors (5923967542).

11819123978 is a wasteful number, since it uses less digits than its factorization.

11819123978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801852.

The product of its digits is 217728, while the sum is 50.

The spelling of 11819123978 in words is "eleven billion, eight hundred nineteen million, one hundred twenty-three thousand, nine hundred seventy-eight".