27779340502447 has 2 divisors, whose sum is σ = 27779340502448. Its totient is φ = 27779340502446.

The previous prime is 27779340502429. The next prime is 27779340502451. The reversal of 27779340502447 is 74420504397772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27779340502447 - 2¹¹ = 27779340500399 is a prime.

It is a super-3 number, since 3×27779340502447³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27779340502747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13889670251223 + 13889670251224.

It is an arithmetic number, because the mean of its divisors is an integer number (13889670251224).

Almost surely, 2^{27779340502447} is an apocalyptic number.

27779340502447 is a deficient number, since it is larger than the sum of its proper divisors (1).

27779340502447 is an equidigital number, since it uses as much as digits as its factorization.

27779340502447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82978560, while the sum is 61.

The spelling of 27779340502447 in words is "twenty-seven trillion, seven hundred seventy-nine billion, three hundred forty million, five hundred two thousand, four hundred forty-seven".