11771706388 has 12 divisors (see below), whose sum is σ = 22185139060. Its totient is φ = 5433095232.

The previous prime is 11771706379. The next prime is 11771706391. The reversal of 11771706388 is 88360717711.

It can be written as a sum of positive squares in 2 ways, for example, as 1055730064 + 10715976324 = 32492^2 + 103518^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 113189433 + ... + 113189536.

Almost surely, 2^11771706388 is an apocalyptic number.

It is an amenable number.

11771706388 is a deficient number, since it is larger than the sum of its proper divisors (10413432672).

11771706388 is a wasteful number, since it uses less digits than its factorization.

11771706388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226378986 (or 226378984 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 49.

The spelling of 11771706388 in words is "eleven billion, seven hundred seventy-one million, seven hundred six thousand, three hundred eighty-eight".