16621746484080 has 320 divisors, whose sum is σ = 55251749376000. Its totient is φ = 4121109135360.

The previous prime is 16621746484051. The next prime is 16621746484081. The reversal of 16621746484080 is 8048464712661.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 16621746484080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16621746484081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 124827297 + ... + 124960383.

It is an arithmetic number, because the mean of its divisors is an integer number (172661716800).

Almost surely, 2^{16621746484080} is an apocalyptic number.

16621746484080 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 16621746484080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27625874688000).

16621746484080 is an abundant number, since it is smaller than the sum of its proper divisors (38630002891920).

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

16621746484080 is a wasteful number, since it uses less digits than its factorization.

16621746484080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133632 (or 133626 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 57.

The spelling of 16621746484080 in words is "sixteen trillion, six hundred twenty-one billion, seven hundred forty-six million, four hundred eighty-four thousand, eighty".