16866939802356 has 144 divisors (see below), whose sum is σ = 48933648167040. Its totient is φ = 4798669824000.

The previous prime is 16866939802343. The next prime is 16866939802369. The reversal of 16866939802356 is 65320893966861.

16866939802356 is a `hidden beast` number, since 168 + 6 + 6 + 9 + 39 + 80 + 2 + 356 = 666.

It is an interprime number because it is at equal distance from previous prime (16866939802343) and next prime (16866939802369).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256580500 + ... + 256646228.

It is an arithmetic number, because the mean of its divisors is an integer number (339817001160).

Almost surely, 2^{16866939802356} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16866939802356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24466824083520).

16866939802356 is an abundant number, since it is smaller than the sum of its proper divisors (32066708364684).

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

16866939802356 is a wasteful number, since it uses less digits than its factorization.

16866939802356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70054 (or 70049 counting only the distinct ones).

The product of its (nonzero) digits is 604661760, while the sum is 72.

The spelling of 16866939802356 in words is "sixteen trillion, eight hundred sixty-six billion, nine hundred thirty-nine million, eight hundred two thousand, three hundred fifty-six".