16851388463280 has 1600 divisors, whose sum is σ = 70660168888320. Its totient is φ = 3641443319808.

The previous prime is 16851388463251. The next prime is 16851388463297. The reversal of 16851388463280 is 8236488315861.

16851388463280 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 13 + 88 + 463 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 17248094152 + ... + 17248095128.

Almost surely, 2^{16851388463280} is an apocalyptic number.

16851388463280 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 16851388463280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35330084444160).

16851388463280 is an abundant number, since it is smaller than the sum of its proper divisors (53808780425040).

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

16851388463280 is a wasteful number, since it uses less digits than its factorization.

16851388463280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 63.

The spelling of 16851388463280 in words is "sixteen trillion, eight hundred fifty-one billion, three hundred eighty-eight million, four hundred sixty-three thousand, two hundred eighty".