28013001641 has 2 divisors, whose sum is σ = 28013001642. Its totient is φ = 28013001640.

The previous prime is 28013001637. The next prime is 28013001673. The reversal of 28013001641 is 14610031082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27987951616 + 25050025 = 167296^2 + 5005^2 .

It is a cyclic number.

It is not a de Polignac number, because 28013001641 - 2² = 28013001637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28013001641.

It is not a weakly prime, because it can be changed into another prime (28013001691) 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, 14006500820 + 14006500821.

It is an arithmetic number, because the mean of its divisors is an integer number (14006500821).

Almost surely, 2^28013001641 is an apocalyptic number.

It is an amenable number.

28013001641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013001641 is an equidigital number, since it uses as much as digits as its factorization.

28013001641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 28013001641 in words is "twenty-eight billion, thirteen million, one thousand, six hundred forty-one".