81894327127 has 2 divisors, whose sum is σ = 81894327128. Its totient is φ = 81894327126.

The previous prime is 81894327083. The next prime is 81894327143. The reversal of 81894327127 is 72172349818.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81894327127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81895327127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40947163563 + 40947163564.

It is an arithmetic number, because the mean of its divisors is an integer number (40947163564).

Almost surely, 2^81894327127 is an apocalyptic number.

81894327127 is a deficient number, since it is larger than the sum of its proper divisors (1).

81894327127 is an equidigital number, since it uses as much as digits as its factorization.

81894327127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The spelling of 81894327127 in words is "eighty-one billion, eight hundred ninety-four million, three hundred twenty-seven thousand, one hundred twenty-seven".