18816768410778 has 192 divisors, whose sum is σ = 45992751517440. Its totient is φ = 5527019152512.

The previous prime is 18816768410729. The next prime is 18816768410779. The reversal of 18816768410778 is 87701486761881.

18816768410778 is a `hidden beast` number, since 1 + 8 + 81 + 6 + 7 + 68 + 410 + 7 + 78 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18816768410779) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 1489015476 + ... + 1489028112.

It is an arithmetic number, because the mean of its divisors is an integer number (239545580820).

Almost surely, 2^{18816768410778} is an apocalyptic number.

18816768410778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18816768410778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22996375758720).

18816768410778 is an abundant number, since it is smaller than the sum of its proper divisors (27175983106662).

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

18816768410778 is a wasteful number, since it uses less digits than its factorization.

18816768410778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13250 (or 13201 counting only the distinct ones).

The product of its (nonzero) digits is 202309632, while the sum is 72.

The spelling of 18816768410778 in words is "eighteen trillion, eight hundred sixteen billion, seven hundred sixty-eight million, four hundred ten thousand, seven hundred seventy-eight".