11780371868 has 12 divisors (see below), whose sum is σ = 21700685160. Its totient is φ = 5580176112.

The previous prime is 11780371859. The next prime is 11780371871. The reversal of 11780371868 is 86817308711.

It is a happy number.

It is a super-2 number, since 2×11780371868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77502371 + ... + 77502522.

It is an arithmetic number, because the mean of its divisors is an integer number (1808390430).

Almost surely, 2^11780371868 is an apocalyptic number.

It is an amenable number.

11780371868 is a deficient number, since it is larger than the sum of its proper divisors (9920313292).

11780371868 is a wasteful number, since it uses less digits than its factorization.

11780371868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155004916 (or 155004914 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 50.

The spelling of 11780371868 in words is "eleven billion, seven hundred eighty million, three hundred seventy-one thousand, eight hundred sixty-eight".