11856985269 has 16 divisors (see below), whose sum is σ = 16422352320. Its totient is φ = 7600400640.

The previous prime is 11856985253. The next prime is 11856985289. The reversal of 11856985269 is 96258965811.

It is not a de Polignac number, because 11856985269 - 2⁴ = 11856985253 is a prime.

It is a super-2 number, since 2×11856985269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856985219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 261787 + ... + 303720.

It is an arithmetic number, because the mean of its divisors is an integer number (1026397020).

Almost surely, 2^11856985269 is an apocalyptic number.

It is an amenable number.

11856985269 is a deficient number, since it is larger than the sum of its proper divisors (4565367051).

11856985269 is a wasteful number, since it uses less digits than its factorization.

11856985269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565780.

The product of its digits is 9331200, while the sum is 60.

The spelling of 11856985269 in words is "eleven billion, eight hundred fifty-six million, nine hundred eighty-five thousand, two hundred sixty-nine".