1778466488064 has 288 divisors, whose sum is σ = 5530766524416. Its totient is φ = 496766791680.

The previous prime is 1778466488003. The next prime is 1778466488077. The reversal of 1778466488064 is 4608846648771.

It is a self number, because there is not a number n which added to its sum of digits gives 1778466488064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260501419 + ... + 260508245.

It is an arithmetic number, because the mean of its divisors is an integer number (19204050432).

Almost surely, 2^{1778466488064} is an apocalyptic number.

1778466488064 is a gapful number since it is divisible by the number (14) 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 1778466488064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2765383262208).

1778466488064 is an abundant number, since it is smaller than the sum of its proper divisors (3752300036352).

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

1778466488064 is a wasteful number, since it uses less digits than its factorization.

1778466488064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931 (or 7917 counting only the distinct ones).

The product of its (nonzero) digits is 346816512, while the sum is 69.

The spelling of 1778466488064 in words is "one trillion, seven hundred seventy-eight billion, four hundred sixty-six million, four hundred eighty-eight thousand, sixty-four".