16408400273 has 2 divisors, whose sum is σ = 16408400274. Its totient is φ = 16408400272.

The previous prime is 16408400263. The next prime is 16408400321. The reversal of 16408400273 is 37200480461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16092698449 + 315701824 = 126857^2 + 17768^2 .

It is an emirp because it is prime and its reverse (37200480461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16408400273 is a prime.

It is not a weakly prime, because it can be changed into another prime (16408400263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8204200136 + 8204200137.

It is an arithmetic number, because the mean of its divisors is an integer number (8204200137).

Almost surely, 2^16408400273 is an apocalyptic number.

It is an amenable number.

16408400273 is a deficient number, since it is larger than the sum of its proper divisors (1).

16408400273 is an equidigital number, since it uses as much as digits as its factorization.

16408400273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 16408400273 in words is "sixteen billion, four hundred eight million, four hundred thousand, two hundred seventy-three".