11806747605 has 24 divisors (see below), whose sum is σ = 21668855832. Its totient is φ = 5926523904.

The previous prime is 11806747597. The next prime is 11806747609. The reversal of 11806747605 is 50674760811.

11806747605 is a `hidden beast` number, since 118 + 0 + 67 + 476 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1217102769 + 10589644836 = 34887^2 + 102906^2 .

It is not a de Polignac number, because 11806747605 - 2³ = 11806747597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11806747609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7716064 + ... + 7717593.

It is an arithmetic number, because the mean of its divisors is an integer number (902868993).

Almost surely, 2^11806747605 is an apocalyptic number.

11806747605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11806747605 is a deficient number, since it is larger than the sum of its proper divisors (9862108227).

11806747605 is a wasteful number, since it uses less digits than its factorization.

11806747605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15433685 (or 15433682 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 11806747605 in words is "eleven billion, eight hundred six million, seven hundred forty-seven thousand, six hundred five".