11808731265 has 32 divisors (see below), whose sum is σ = 19512192000. Its totient is φ = 6092098560.

The previous prime is 11808731237. The next prime is 11808731273. The reversal of 11808731265 is 56213780811.

It is not a de Polignac number, because 11808731265 - 2⁹ = 11808730753 is a prime.

It is a super-2 number, since 2×11808731265² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1413621 + ... + 1421949.

It is an arithmetic number, because the mean of its divisors is an integer number (609756000).

Almost surely, 2^11808731265 is an apocalyptic number.

11808731265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11808731265 is a deficient number, since it is larger than the sum of its proper divisors (7703460735).

11808731265 is a wasteful number, since it uses less digits than its factorization.

11808731265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11417.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 11808731265 in words is "eleven billion, eight hundred eight million, seven hundred thirty-one thousand, two hundred sixty-five".