28425020549 has 2 divisors, whose sum is σ = 28425020550. Its totient is φ = 28425020548.

The previous prime is 28425020543. The next prime is 28425020551. The reversal of 28425020549 is 94502052482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28165230625 + 259789924 = 167825^2 + 16118^2 .

It is a cyclic number.

It is not a de Polignac number, because 28425020549 - 2¹² = 28425016453 is a prime.

It is a super-2 number, since 2×28425020549² (a number of 22 digits) contains 22 as substring.

Together with 28425020551, 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 (28425020543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212510274 + 14212510275.

It is an arithmetic number, because the mean of its divisors is an integer number (14212510275).

Almost surely, 2^28425020549 is an apocalyptic number.

It is an amenable number.

28425020549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28425020549 is an equidigital number, since it uses as much as digits as its factorization.

28425020549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 28425020549 in words is "twenty-eight billion, four hundred twenty-five million, twenty thousand, five hundred forty-nine".