27480449779 has 2 divisors, whose sum is σ = 27480449780. Its totient is φ = 27480449778.

The previous prime is 27480449743. The next prime is 27480449791. The reversal of 27480449779 is 97794408472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27480449779 - 2⁷ = 27480449651 is a prime.

It is a super-2 number, since 2×27480449779² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27480449729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13740224889 + 13740224890.

It is an arithmetic number, because the mean of its divisors is an integer number (13740224890).

Almost surely, 2^27480449779 is an apocalyptic number.

27480449779 is a deficient number, since it is larger than the sum of its proper divisors (1).

27480449779 is an equidigital number, since it uses as much as digits as its factorization.

27480449779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 27480449779 in words is "twenty-seven billion, four hundred eighty million, four hundred forty-nine thousand, seven hundred seventy-nine".