11868218705 has 24 divisors (see below), whose sum is σ = 16651228968. Its totient is φ = 8096863488.

The previous prime is 11868218683. The next prime is 11868218717. The reversal of 11868218705 is 50781286811.

It can be written as a sum of positive squares in 4 ways, for example, as 5534764816 + 6333453889 = 74396^2 + 79583^2 .

It is not a de Polignac number, because 11868218705 - 2⁶ = 11868218641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11868218705.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74684 + ... + 171213.

It is an arithmetic number, because the mean of its divisors is an integer number (693801207).

Almost surely, 2^11868218705 is an apocalyptic number.

It is an amenable number.

11868218705 is a deficient number, since it is larger than the sum of its proper divisors (4783010263).

11868218705 is a wasteful number, since it uses less digits than its factorization.

11868218705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246113 (or 246106 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 47.

The spelling of 11868218705 in words is "eleven billion, eight hundred sixty-eight million, two hundred eighteen thousand, seven hundred five".