11778454338 has 16 divisors (see below), whose sum is σ = 26922181440. Its totient is φ = 3365272656.

The previous prime is 11778454277. The next prime is 11778454351. The reversal of 11778454338 is 83345487711.

11778454338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140219653 + ... + 140219736.

It is an arithmetic number, because the mean of its divisors is an integer number (1682636340).

Almost surely, 2^11778454338 is an apocalyptic number.

11778454338 is an abundant number, since it is smaller than the sum of its proper divisors (15143727102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11778454338 is a wasteful number, since it uses less digits than its factorization.

11778454338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280439401.

The product of its digits is 2257920, while the sum is 51.

The spelling of 11778454338 in words is "eleven billion, seven hundred seventy-eight million, four hundred fifty-four thousand, three hundred thirty-eight".