11671071280 has 80 divisors (see below), whose sum is σ = 29629558944. Its totient is φ = 4240087040.

The previous prime is 11671071229. The next prime is 11671071289. The reversal of 11671071280 is 8217017611.

11671071280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11671071289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044282 + ... + 1055398.

Almost surely, 2^11671071280 is an apocalyptic number.

11671071280 is a gapful number since it is divisible by the number (10) 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 11671071280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14814779472).

11671071280 is an abundant number, since it is smaller than the sum of its proper divisors (17958487664).

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

11671071280 is a wasteful number, since it uses less digits than its factorization.

11671071280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12334 (or 12328 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 34.

Adding to 11671071280 its reverse (8217017611), we get a palindrome (19888088891).

The spelling of 11671071280 in words is "eleven billion, six hundred seventy-one million, seventy-one thousand, two hundred eighty".