16400308600201 has 2 divisors, whose sum is σ = 16400308600202. Its totient is φ = 16400308600200.

The previous prime is 16400308600199. The next prime is 16400308600261. The reversal of 16400308600201 is 10200680300461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9273998264976 + 7126310335225 = 3045324^2 + 2669515^2 .

It is a cyclic number.

It is not a de Polignac number, because 16400308600201 - 2¹ = 16400308600199 is a prime.

Together with 16400308600199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16400308600261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200154300100 + 8200154300101.

It is an arithmetic number, because the mean of its divisors is an integer number (8200154300101).

Almost surely, 2^{16400308600201} is an apocalyptic number.

It is an amenable number.

16400308600201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400308600201 is an equidigital number, since it uses as much as digits as its factorization.

16400308600201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 16400308600201 its reverse (10200680300461), we get a palindrome (26600988900662).

The spelling of 16400308600201 in words is "sixteen trillion, four hundred billion, three hundred eight million, six hundred thousand, two hundred one".