1155441778 has 16 divisors (see below), whose sum is σ = 1748688480. Its totient is φ = 572567616.

The previous prime is 1155441767. The next prime is 1155441779. The reversal of 1155441778 is 8771445511.

It is not an unprimeable number, because it can be changed into a prime (1155441779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104650 + ... + 115162.

It is an arithmetic number, because the mean of its divisors is an integer number (109293030).

Almost surely, 2^1155441778 is an apocalyptic number.

1155441778 is a deficient number, since it is larger than the sum of its proper divisors (593246702).

1155441778 is a wasteful number, since it uses less digits than its factorization.

1155441778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001.

The product of its digits is 156800, while the sum is 43.

The square root of 1155441778 is about 33991.7898616710. The cubic root of 1155441778 is about 1049.3395023668.

The spelling of 1155441778 in words is "one billion, one hundred fifty-five million, four hundred forty-one thousand, seven hundred seventy-eight".