208603580006401 has 2 divisors, whose sum is σ = 208603580006402. Its totient is φ = 208603580006400.

The previous prime is 208603580006399. The next prime is 208603580006443. The reversal of 208603580006401 is 104600085306802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123885269901376 + 84718310105025 = 11130376^2 + 9204255^2 .

It is a cyclic number.

It is not a de Polignac number, because 208603580006401 - 2¹ = 208603580006399 is a prime.

Together with 208603580006399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (208603580006501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104301790003200 + 104301790003201.

It is an arithmetic number, because the mean of its divisors is an integer number (104301790003201).

Almost surely, 2^{208603580006401} is an apocalyptic number.

It is an amenable number.

208603580006401 is a deficient number, since it is larger than the sum of its proper divisors (1).

208603580006401 is an equidigital number, since it uses as much as digits as its factorization.

208603580006401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 208603580006401 in words is "two hundred eight trillion, six hundred three billion, five hundred eighty million, six thousand, four hundred one".