11111863816 has 32 divisors (see below), whose sum is σ = 22339584000. Its totient is φ = 5162916096.

The previous prime is 11111863813. The next prime is 11111863843. The reversal of 11111863816 is 61836811111.

It is not an unprimeable number, because it can be changed into a prime (11111863813) by changing a digit.

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, 506376 + ... + 527863.

It is an arithmetic number, because the mean of its divisors is an integer number (698112000).

Almost surely, 2^11111863816 is an apocalyptic number.

It is an amenable number.

11111863816 is an abundant number, since it is smaller than the sum of its proper divisors (11227720184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111863816 is a wasteful number, since it uses less digits than its factorization.

11111863816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034341 (or 1034337 counting only the distinct ones).

The product of its digits is 6912, while the sum is 37.

The spelling of 11111863816 in words is "eleven billion, one hundred eleven million, eight hundred sixty-three thousand, eight hundred sixteen".