1113555778 has 16 divisors (see below), whose sum is σ = 1718750880. Its totient is φ = 540783936.

The previous prime is 1113555761. The next prime is 1113555809. The reversal of 1113555778 is 8775553111.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a plaindrome in base 10.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20775 + ... + 51562.

It is an arithmetic number, because the mean of its divisors is an integer number (107421930).

Almost surely, 2^1113555778 is an apocalyptic number.

1113555778 is a deficient number, since it is larger than the sum of its proper divisors (605195102).

1113555778 is a wasteful number, since it uses less digits than its factorization.

1113555778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72561.

The product of its digits is 147000, while the sum is 43.

The square root of 1113555778 is about 33369.9831884884. The cubic root of 1113555778 is about 1036.5032270720.

The spelling of 1113555778 in words is "one billion, one hundred thirteen million, five hundred fifty-five thousand, seven hundred seventy-eight".