11718287805 has 64 divisors (see below), whose sum is σ = 21695385600. Its totient is φ = 5290444800.

The previous prime is 11718287767. The next prime is 11718287837. The reversal of 11718287805 is 50878281711.

It is not a de Polignac number, because 11718287805 - 2⁶ = 11718287741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2835981 + ... + 2840109.

It is an arithmetic number, because the mean of its divisors is an integer number (338990400).

Almost surely, 2^11718287805 is an apocalyptic number.

11718287805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11718287805 is a deficient number, since it is larger than the sum of its proper divisors (9977097795).

11718287805 is a wasteful number, since it uses less digits than its factorization.

11718287805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474.

The product of its (nonzero) digits is 250880, while the sum is 48.

The spelling of 11718287805 in words is "eleven billion, seven hundred eighteen million, two hundred eighty-seven thousand, eight hundred five".