11778446858 has 4 divisors (see below), whose sum is σ = 17667670290. Its totient is φ = 5889223428.

The previous prime is 11778446819. The next prime is 11778446863. The reversal of 11778446858 is 85864487711.

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., 7384480489 + 4393966369 = 85933^2 + 66287^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11778446797 and 11778446806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2944611713 + ... + 2944611716.

Almost surely, 2^11778446858 is an apocalyptic number.

11778446858 is a deficient number, since it is larger than the sum of its proper divisors (5889223432).

11778446858 is an equidigital number, since it uses as much as digits as its factorization.

11778446858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889223431.

The product of its digits is 12042240, while the sum is 59.

The spelling of 11778446858 in words is "eleven billion, seven hundred seventy-eight million, four hundred forty-six thousand, eight hundred fifty-eight".