11788666840 has 16 divisors (see below), whose sum is σ = 26524500480. Its totient is φ = 4715466720.

The previous prime is 11788666823. The next prime is 11788666861. The reversal of 11788666840 is 4866688711.

It is a happy number.

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, 147358296 + ... + 147358375.

It is an arithmetic number, because the mean of its divisors is an integer number (1657781280).

Almost surely, 2^11788666840 is an apocalyptic number.

11788666840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11788666840 is an abundant number, since it is smaller than the sum of its proper divisors (14735833640).

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

11788666840 is a wasteful number, since it uses less digits than its factorization.

11788666840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294716682 (or 294716678 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 11788666840 in words is "eleven billion, seven hundred eighty-eight million, six hundred sixty-six thousand, eight hundred forty".