28425020249 has 2 divisors, whose sum is σ = 28425020250. Its totient is φ = 28425020248.

The previous prime is 28425020237. The next prime is 28425020251. The reversal of 28425020249 is 94202052482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27049723024 + 1375297225 = 164468^2 + 37085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28425020249 is a prime.

Together with 28425020251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28425020549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212510124 + 14212510125.

It is an arithmetic number, because the mean of its divisors is an integer number (14212510125).

Almost surely, 2^28425020249 is an apocalyptic number.

It is an amenable number.

28425020249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425020249 is an equidigital number, since it uses as much as digits as its factorization.

28425020249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 28425020249 in words is "twenty-eight billion, four hundred twenty-five million, twenty thousand, two hundred forty-nine".