16681338554370 has 256 divisors, whose sum is σ = 46266189742080. Its totient is φ = 3770545075200.

The previous prime is 16681338554329. The next prime is 16681338554399. The reversal of 16681338554370 is 7345583318661.

It is a super-2 number, since 2×16681338554370² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5417776491 + ... + 5417779569.

It is an arithmetic number, because the mean of its divisors is an integer number (180727303680).

Almost surely, 2^{16681338554370} is an apocalyptic number.

16681338554370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16681338554370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23133094871040).

16681338554370 is an abundant number, since it is smaller than the sum of its proper divisors (29584851187710).

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

16681338554370 is a wasteful number, since it uses less digits than its factorization.

16681338554370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 16681338554370 in words is "sixteen trillion, six hundred eighty-one billion, three hundred thirty-eight million, five hundred fifty-four thousand, three hundred seventy".