11556970868 has 12 divisors (see below), whose sum is σ = 20771312772. Its totient is φ = 5622310080.

The previous prime is 11556970861. The next prime is 11556970897. The reversal of 11556970868 is 86807965511.

It can be written as a sum of positive squares in 2 ways, for example, as 5709615844 + 5847355024 = 75562^2 + 76468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556970861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39043673 + ... + 39043968.

It is an arithmetic number, because the mean of its divisors is an integer number (1730942731).

Almost surely, 2^11556970868 is an apocalyptic number.

It is an amenable number.

11556970868 is a deficient number, since it is larger than the sum of its proper divisors (9214341904).

11556970868 is a wasteful number, since it uses less digits than its factorization.

11556970868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78087682 (or 78087680 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 11556970868 in words is "eleven billion, five hundred fifty-six million, nine hundred seventy thousand, eight hundred sixty-eight".