11155066778 has 16 divisors (see below), whose sum is σ = 17056546080. Its totient is φ = 5470279056.

The previous prime is 11155066777. The next prime is 11155066787. The reversal of 11155066778 is 87766055111.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11155066777) 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, 151076 + ... + 212447.

It is an arithmetic number, because the mean of its divisors is an integer number (1066034130).

Almost surely, 2^11155066778 is an apocalyptic number.

11155066778 is a deficient number, since it is larger than the sum of its proper divisors (5901479302).

11155066778 is a wasteful number, since it uses less digits than its factorization.

11155066778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363821.

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 11155066778 in words is "eleven billion, one hundred fifty-five million, sixty-six thousand, seven hundred seventy-eight".