11778284111 has 12 divisors (see below), whose sum is σ = 13296285576. Its totient is φ = 10418134320.

The previous prime is 11778284093. The next prime is 11778284117. The reversal of 11778284111 is 11148287711.

It is a de Polignac number, because none of the positive numbers 2^k-11778284111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778284117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1310945 + ... + 1319898.

It is an arithmetic number, because the mean of its divisors is an integer number (1108023798).

Almost surely, 2^11778284111 is an apocalyptic number.

11778284111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11778284111 is a deficient number, since it is larger than the sum of its proper divisors (1518001465).

11778284111 is a wasteful number, since it uses less digits than its factorization.

11778284111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630902 (or 2630891 counting only the distinct ones).

The product of its digits is 25088, while the sum is 41.

The spelling of 11778284111 in words is "eleven billion, seven hundred seventy-eight million, two hundred eighty-four thousand, one hundred eleven".