28429636549 has 2 divisors, whose sum is σ = 28429636550. Its totient is φ = 28429636548.

The previous prime is 28429636541. The next prime is 28429636553. The reversal of 28429636549 is 94563692482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14395680324 + 14033956225 = 119982^2 + 118465^2 .

It is a cyclic number.

It is not a de Polignac number, because 28429636549 - 2³ = 28429636541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28429636493 and 28429636502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28429636541) 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, 14214818274 + 14214818275.

It is an arithmetic number, because the mean of its divisors is an integer number (14214818275).

Almost surely, 2^28429636549 is an apocalyptic number.

It is an amenable number.

28429636549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28429636549 is an equidigital number, since it uses as much as digits as its factorization.

28429636549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 58.

The spelling of 28429636549 in words is "twenty-eight billion, four hundred twenty-nine million, six hundred thirty-six thousand, five hundred forty-nine".