16040520556800 has 216 divisors, whose sum is σ = 53057673049920. Its totient is φ = 4267726233600.

The previous prime is 16040520556789. The next prime is 16040520556807. The reversal of 16040520556800 is 865502504061.

It is not an unprimeable number, because it can be changed into a prime (16040520556807) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 7477270 + ... + 9380330.

Almost surely, 2^{16040520556800} is an apocalyptic number.

16040520556800 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 16040520556800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26528836524960).

16040520556800 is an abundant number, since it is smaller than the sum of its proper divisors (37017152493120).

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

16040520556800 is a wasteful number, since it uses less digits than its factorization.

16040520556800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903529 (or 1903510 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 16040520556800 in words is "sixteen trillion, forty billion, five hundred twenty million, five hundred fifty-six thousand, eight hundred".