11605847868 has 72 divisors (see below), whose sum is σ = 30216474288. Its totient is φ = 3753243648.

The previous prime is 11605847867. The next prime is 11605847873. The reversal of 11605847868 is 86874850611.

It is a happy number.

11605847868 is a `hidden beast` number, since 1 + 1 + 60 + 58 + 478 + 68 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11605847867) 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 23 ways as a sum of consecutive naturals, for example, 457855 + ... + 482537.

It is an arithmetic number, because the mean of its divisors is an integer number (419673254).

Almost surely, 2^11605847868 is an apocalyptic number.

11605847868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11605847868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15108237144).

11605847868 is an abundant number, since it is smaller than the sum of its proper divisors (18610626420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11605847868 is a wasteful number, since it uses less digits than its factorization.

11605847868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25083 (or 25078 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 11605847868 in words is "eleven billion, six hundred five million, eight hundred forty-seven thousand, eight hundred sixty-eight".