16550605420400 has 240 divisors, whose sum is σ = 40471009689600. Its totient is φ = 6503544960000.

The previous prime is 16550605420369. The next prime is 16550605420441. The reversal of 16550605420400 is 402450605561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3233169041 + ... + 3233174159.

It is an arithmetic number, because the mean of its divisors is an integer number (168629207040).

Almost surely, 2^{16550605420400} is an apocalyptic number.

16550605420400 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 16550605420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20235504844800).

16550605420400 is an abundant number, since it is smaller than the sum of its proper divisors (23920404269200).

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

16550605420400 is a wasteful number, since it uses less digits than its factorization.

16550605420400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848 (or 5837 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 16550605420400 in words is "sixteen trillion, five hundred fifty billion, six hundred five million, four hundred twenty thousand, four hundred".