16551242401200 has 480 divisors, whose sum is σ = 58985050048512. Its totient is φ = 3939674112000.

The previous prime is 16551242401151. The next prime is 16551242401229. The reversal of 16551242401200 is 210424215561.

It is a happy number.

It is a super-2 number, since 2×16551242401200² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 658167027 + ... + 658192173.

Almost surely, 2^{16551242401200} is an apocalyptic number.

16551242401200 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 16551242401200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29492525024256).

16551242401200 is an abundant number, since it is smaller than the sum of its proper divisors (42433807647312).

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

16551242401200 is a wasteful number, since it uses less digits than its factorization.

16551242401200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26573 (or 26562 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 16551242401200 its reverse (210424215561), we get a palindrome (16761666616761).

The spelling of 16551242401200 in words is "sixteen trillion, five hundred fifty-one billion, two hundred forty-two million, four hundred one thousand, two hundred".