16545655721056 has 192 divisors, whose sum is σ = 40790881829376. Its totient is φ = 6418033459200.

The previous prime is 16545655721047. The next prime is 16545655721071. The reversal of 16545655721056 is 65012755654561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 567959611 + ... + 567988741.

It is an arithmetic number, because the mean of its divisors is an integer number (212452509528).

Almost surely, 2^{16545655721056} is an apocalyptic number.

16545655721056 is a gapful number since it is divisible by the number (16) 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 16545655721056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20395440914688).

16545655721056 is an abundant number, since it is smaller than the sum of its proper divisors (24245226108320).

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

16545655721056 is a wasteful number, since it uses less digits than its factorization.

16545655721056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30165 (or 30157 counting only the distinct ones).

The product of its (nonzero) digits is 37800000, while the sum is 58.

The spelling of 16545655721056 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-five million, seven hundred twenty-one thousand, fifty-six".