1721600216216 has 16 divisors (see below), whose sum is σ = 3306732123240. Its totient is φ = 839804983360.

The previous prime is 1721600216197. The next prime is 1721600216221. The reversal of 1721600216216 is 6126120061271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624390246 + ... + 2624390901.

Almost surely, 2^{1721600216216} is an apocalyptic number.

It is an amenable number.

1721600216216 is a deficient number, since it is larger than the sum of its proper divisors (1585131907024).

1721600216216 is a wasteful number, since it uses less digits than its factorization.

1721600216216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248781194 (or 5248781190 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

Adding to 1721600216216 its reverse (6126120061271), we get a palindrome (7847720277487).

The spelling of 1721600216216 in words is "one trillion, seven hundred twenty-one billion, six hundred million, two hundred sixteen thousand, two hundred sixteen".