28318207901 has 2 divisors, whose sum is σ = 28318207902. Its totient is φ = 28318207900.

The previous prime is 28318207891. The next prime is 28318207903. The reversal of 28318207901 is 10970281382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25122567001 + 3195640900 = 158501^2 + 56530^2 .

It is a cyclic number.

It is not a de Polignac number, because 28318207901 - 2²² = 28314013597 is a prime.

Together with 28318207903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28318207903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159103950 + 14159103951.

It is an arithmetic number, because the mean of its divisors is an integer number (14159103951).

Almost surely, 2^28318207901 is an apocalyptic number.

It is an amenable number.

28318207901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28318207901 is an equidigital number, since it uses as much as digits as its factorization.

28318207901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 28318207901 in words is "twenty-eight billion, three hundred eighteen million, two hundred seven thousand, nine hundred one".