1678978485184 has 672 divisors, whose sum is σ = 4614917400576. Its totient is φ = 588374691840.

The previous prime is 1678978485139. The next prime is 1678978485211. The reversal of 1678978485184 is 4815848798761.

It is a self number, because there is not a number n which added to its sum of digits gives 1678978485184.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7396380879 + ... + 7396381105.

It is an arithmetic number, because the mean of its divisors is an integer number (6867436608).

Almost surely, 2^{1678978485184} is an apocalyptic number.

1678978485184 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 1678978485184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2307458700288).

1678978485184 is an abundant number, since it is smaller than the sum of its proper divisors (2935938915392).

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

1678978485184 is a wasteful number, since it uses less digits than its factorization.

1678978485184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 450 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 76.

The spelling of 1678978485184 in words is "one trillion, six hundred seventy-eight billion, nine hundred seventy-eight million, four hundred eighty-five thousand, one hundred eighty-four".