28067254661 has 2 divisors, whose sum is σ = 28067254662. Its totient is φ = 28067254660.

The previous prime is 28067254639. The next prime is 28067254763. The reversal of 28067254661 is 16645276082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24702094561 + 3365160100 = 157169^2 + 58010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28067254661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28067257661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14033627330 + 14033627331.

It is an arithmetic number, because the mean of its divisors is an integer number (14033627331).

Almost surely, 2^28067254661 is an apocalyptic number.

It is an amenable number.

28067254661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28067254661 is an equidigital number, since it uses as much as digits as its factorization.

28067254661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 28067254661 in words is "twenty-eight billion, sixty-seven million, two hundred fifty-four thousand, six hundred sixty-one".