16800561632321 has 16 divisors (see below), whose sum is σ = 17895838705920. Its totient is φ = 15717179596800.

The previous prime is 16800561632263. The next prime is 16800561632357. The reversal of 16800561632321 is 12323616500861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16800561632321 - 2¹⁰ = 16800561631297 is a prime.

It is a super-2 number, since 2×16800561632321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16800561662321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159041921 + ... + 159147521.

It is an arithmetic number, because the mean of its divisors is an integer number (1118489919120).

Almost surely, 2^{16800561632321} is an apocalyptic number.

It is an amenable number.

16800561632321 is a deficient number, since it is larger than the sum of its proper divisors (1095277073599).

16800561632321 is a wasteful number, since it uses less digits than its factorization.

16800561632321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161824.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 16800561632321 in words is "sixteen trillion, eight hundred billion, five hundred sixty-one million, six hundred thirty-two thousand, three hundred twenty-one".