11889022778 has 4 divisors (see below), whose sum is σ = 17833534170. Its totient is φ = 5944511388.

The previous prime is 11889022771. The next prime is 11889022781. The reversal of 11889022778 is 87722098811.

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

It can be written as a sum of positive squares in only one way, i.e., 6198885289 + 5690137489 = 78733^2 + 75433^2 .

It is not an unprimeable number, because it can be changed into a prime (11889022771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2972255693 + ... + 2972255696.

Almost surely, 2^11889022778 is an apocalyptic number.

11889022778 is a deficient number, since it is larger than the sum of its proper divisors (5944511392).

11889022778 is an equidigital number, since it uses as much as digits as its factorization.

11889022778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5944511391.

The product of its (nonzero) digits is 903168, while the sum is 53.

The spelling of 11889022778 in words is "eleven billion, eight hundred eighty-nine million, twenty-two thousand, seven hundred seventy-eight".