5651721216000 has 1568 divisors, whose sum is σ = 21654689236128. Its totient is φ = 1471492915200.

The previous prime is 5651721215989. The next prime is 5651721216013. The reversal of 5651721216000 is 6121271565.

5651721216000 is a `hidden beast` number, since 5 + 6 + 5 + 1 + 7 + 21 + 21 + 600 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 50015231944 + ... + 50015232056.

Almost surely, 2^{5651721216000} is an apocalyptic number.

5651721216000 is a gapful number since it is divisible by the number (50) 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 5651721216000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10827344618064).

5651721216000 is an abundant number, since it is smaller than the sum of its proper divisors (16002968020128).

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

5651721216000 is an frugal number, since it uses more digits than its factorization.

5651721216000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 5651721216000 its reverse (6121271565), we get a palindrome (5657842487565).

The spelling of 5651721216000 in words is "five trillion, six hundred fifty-one billion, seven hundred twenty-one million, two hundred sixteen thousand".