27960621847 has 2 divisors, whose sum is σ = 27960621848. Its totient is φ = 27960621846.

The previous prime is 27960621781. The next prime is 27960621851. The reversal of 27960621847 is 74812606972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27960621847 - 2⁷ = 27960621719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27960621794 and 27960621803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27960622847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13980310923 + 13980310924.

It is an arithmetic number, because the mean of its divisors is an integer number (13980310924).

Almost surely, 2^27960621847 is an apocalyptic number.

27960621847 is a deficient number, since it is larger than the sum of its proper divisors (1).

27960621847 is an equidigital number, since it uses as much as digits as its factorization.

27960621847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 27960621847 in words is "twenty-seven billion, nine hundred sixty million, six hundred twenty-one thousand, eight hundred forty-seven".