27840565829 has 2 divisors, whose sum is σ = 27840565830. Its totient is φ = 27840565828.

The previous prime is 27840565813. The next prime is 27840565843. The reversal of 27840565829 is 92856504872.

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., 26675708929 + 1164856900 = 163327^2 + 34130^2 .

It is a cyclic number.

It is not a de Polignac number, because 27840565829 - 2⁴ = 27840565813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27840565849) 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, 13920282914 + 13920282915.

It is an arithmetic number, because the mean of its divisors is an integer number (13920282915).

Almost surely, 2^27840565829 is an apocalyptic number.

It is an amenable number.

27840565829 is a deficient number, since it is larger than the sum of its proper divisors (1).

27840565829 is an equidigital number, since it uses as much as digits as its factorization.

27840565829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 27840565829 in words is "twenty-seven billion, eight hundred forty million, five hundred sixty-five thousand, eight hundred twenty-nine".