27726703891 has 2 divisors, whose sum is σ = 27726703892. Its totient is φ = 27726703890.

The previous prime is 27726703861. The next prime is 27726703897. The reversal of 27726703891 is 19830762772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27726703891 - 2¹³ = 27726695699 is a prime.

It is not a weakly prime, because it can be changed into another prime (27726703897) 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, 13863351945 + 13863351946.

It is an arithmetic number, because the mean of its divisors is an integer number (13863351946).

Almost surely, 2^27726703891 is an apocalyptic number.

27726703891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27726703891 is an equidigital number, since it uses as much as digits as its factorization.

27726703891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 27726703891 in words is "twenty-seven billion, seven hundred twenty-six million, seven hundred three thousand, eight hundred ninety-one".