216104503801 has 2 divisors, whose sum is σ = 216104503802. Its totient is φ = 216104503800.

The previous prime is 216104503799. The next prime is 216104503819. The reversal of 216104503801 is 108305401612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199720503801 + 16384000000 = 446901^2 + 128000^2 .

It is a cyclic number.

It is not a de Polignac number, because 216104503801 - 2¹ = 216104503799 is a prime.

Together with 216104503799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (216104503001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108052251900 + 108052251901.

It is an arithmetic number, because the mean of its divisors is an integer number (108052251901).

Almost surely, 2^216104503801 is an apocalyptic number.

It is an amenable number.

216104503801 is a deficient number, since it is larger than the sum of its proper divisors (1).

216104503801 is an equidigital number, since it uses as much as digits as its factorization.

216104503801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 216104503801 in words is "two hundred sixteen billion, one hundred four million, five hundred three thousand, eight hundred one".