28091616373 has 2 divisors, whose sum is σ = 28091616374. Its totient is φ = 28091616372.

The previous prime is 28091616331. The next prime is 28091616389. The reversal of 28091616373 is 37361619082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27803228049 + 288388324 = 166743^2 + 16982^2 .

It is a cyclic number.

It is not a de Polignac number, because 28091616373 - 2²¹ = 28089519221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28091616473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14045808186 + 14045808187.

It is an arithmetic number, because the mean of its divisors is an integer number (14045808187).

Almost surely, 2^28091616373 is an apocalyptic number.

It is an amenable number.

28091616373 is a deficient number, since it is larger than the sum of its proper divisors (1).

28091616373 is an equidigital number, since it uses as much as digits as its factorization.

28091616373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 28091616373 in words is "twenty-eight billion, ninety-one million, six hundred sixteen thousand, three hundred seventy-three".