18778610880 has 336 divisors, whose sum is σ = 66207741600. Its totient is φ = 4883742720.

The previous prime is 18778610869. The next prime is 18778610887. The reversal of 18778610880 is 8801687781.

It is a happy number.

18778610880 is a `hidden beast` number, since 18 + 7 + 7 + 8 + 610 + 8 + 8 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (18778610887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24419136 + ... + 24419904.

It is an arithmetic number, because the mean of its divisors is an integer number (197046850).

Almost surely, 2^18778610880 is an apocalyptic number.

18778610880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18778610880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33103870800).

18778610880 is an abundant number, since it is smaller than the sum of its proper divisors (47429130720).

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

18778610880 is a wasteful number, since it uses less digits than its factorization.

18778610880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 54.

The spelling of 18778610880 in words is "eighteen billion, seven hundred seventy-eight million, six hundred ten thousand, eight hundred eighty".