16555344622500 has 240 divisors, whose sum is σ = 52563682987200. Its totient is φ = 4038181056000.

The previous prime is 16555344622477. The next prime is 16555344622561. The reversal of 16555344622500 is 522644355561.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16555344622500.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2129434 + ... + 6135566.

It is an arithmetic number, because the mean of its divisors is an integer number (219015345780).

Almost surely, 2^{16555344622500} is an apocalyptic number.

16555344622500 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 16555344622500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26281841493600).

16555344622500 is an abundant number, since it is smaller than the sum of its proper divisors (36008338364700).

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

16555344622500 is a wasteful number, since it uses less digits than its factorization.

16555344622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006208 (or 4006191 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 48.

The spelling of 16555344622500 in words is "sixteen trillion, five hundred fifty-five billion, three hundred forty-four million, six hundred twenty-two thousand, five hundred".