16878778907760 has 1440 divisors, whose sum is σ = 74187465031680. Its totient is φ = 3362591232000.

The previous prime is 16878778907759. The next prime is 16878778907773. The reversal of 16878778907760 is 6770987787861.

It is a self number, because there is not a number n which added to its sum of digits gives 16878778907760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2060645265 + ... + 2060653455.

Almost surely, 2^{16878778907760} is an apocalyptic number.

16878778907760 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 16878778907760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37093732515840).

16878778907760 is an abundant number, since it is smaller than the sum of its proper divisors (57308686123920).

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

16878778907760 is a wasteful number, since it uses less digits than its factorization.

16878778907760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379 (or 8359 counting only the distinct ones).

The product of its (nonzero) digits is 2788079616, while the sum is 81.

The spelling of 16878778907760 in words is "sixteen trillion, eight hundred seventy-eight billion, seven hundred seventy-eight million, nine hundred seven thousand, seven hundred sixty".