1111345778 has 4 divisors (see below), whose sum is σ = 1667018670. Its totient is φ = 555672888.

The previous prime is 1111345769. The next prime is 1111345783. The reversal of 1111345778 is 8775431111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8775431111 = 1877 ⋅4675243.

It can be written as a sum of positive squares in only one way, i.e., 1105762009 + 5583769 = 33253^2 + 2363^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277836443 + ... + 277836446.

Almost surely, 2^1111345778 is an apocalyptic number.

1111345778 is a deficient number, since it is larger than the sum of its proper divisors (555672892).

1111345778 is an equidigital number, since it uses as much as digits as its factorization.

1111345778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555672891.

The product of its digits is 23520, while the sum is 38.

The square root of 1111345778 is about 33336.8531508299. The cubic root of 1111345778 is about 1035.8170799771.

Adding to 1111345778 its reverse (8775431111), we get a palindrome (9886776889).

The spelling of 1111345778 in words is "one billion, one hundred eleven million, three hundred forty-five thousand, seven hundred seventy-eight".