11779066881 has 6 divisors (see below), whose sum is σ = 17014207730. Its totient is φ = 7852711248.

The previous prime is 11779066867. The next prime is 11779066907. The reversal of 11779066881 is 18866097711.

It can be written as a sum of positive squares in only one way, i.e., 11689934400 + 89132481 = 108120^2 + 9441^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11779066881 is a prime.

It is a super-2 number, since 2×11779066881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11779066861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654392596 + ... + 654392613.

Almost surely, 2^11779066881 is an apocalyptic number.

It is an amenable number.

11779066881 is a deficient number, since it is larger than the sum of its proper divisors (5235140849).

11779066881 is a wasteful number, since it uses less digits than its factorization.

11779066881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308785215 (or 1308785212 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 11779066881 in words is "eleven billion, seven hundred seventy-nine million, sixty-six thousand, eight hundred eighty-one".