16871740725780 has 120 divisors (see below), whose sum is σ = 52945972351272. Its totient is φ = 4497541521408.

The previous prime is 16871740725743. The next prime is 16871740725871. The reversal of 16871740725780 is 8752704717861.

16871740725780 is a `hidden beast` number, since 1 + 6 + 8 + 7 + 17 + 40 + 7 + 2 + 578 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5154770649744 + 11716970076036 = 2270412^2 + 3423006^2 .

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 2751364 + ... + 6427556.

Almost surely, 2^{16871740725780} is an apocalyptic number.

16871740725780 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 16871740725780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26472986175636).

16871740725780 is an abundant number, since it is smaller than the sum of its proper divisors (36074231625492).

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

16871740725780 is a wasteful number, since it uses less digits than its factorization.

16871740725780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679047 (or 3679036 counting only the distinct ones).

The product of its (nonzero) digits is 36879360, while the sum is 63.

The spelling of 16871740725780 in words is "sixteen trillion, eight hundred seventy-one billion, seven hundred forty million, seven hundred twenty-five thousand, seven hundred eighty".