11811318685 has 32 divisors (see below), whose sum is σ = 14932615680. Its totient is φ = 8951298048.

The previous prime is 11811318683. The next prime is 11811318697. The reversal of 11811318685 is 58681311811.

It is a cyclic number.

It is not a de Polignac number, because 11811318685 - 2¹ = 11811318683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811318683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11705461 + ... + 11706469.

It is an arithmetic number, because the mean of its divisors is an integer number (466644240).

Almost surely, 2^11811318685 is an apocalyptic number.

It is an amenable number.

11811318685 is a deficient number, since it is larger than the sum of its proper divisors (3121296995).

11811318685 is a wasteful number, since it uses less digits than its factorization.

11811318685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917.

The product of its digits is 46080, while the sum is 43.

The spelling of 11811318685 in words is "eleven billion, eight hundred eleven million, three hundred eighteen thousand, six hundred eighty-five".