81141471466 has 32 divisors (see below), whose sum is σ = 134006918400. Its totient is φ = 36542088000.

The previous prime is 81141471413. The next prime is 81141471469. The reversal of 81141471466 is 66417414118.

It is not an unprimeable number, because it can be changed into a prime (81141471469) 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 in 15 ways as a sum of consecutive naturals, for example, 1270191 + ... + 1332541.

It is an arithmetic number, because the mean of its divisors is an integer number (4187716200).

Almost surely, 2^81141471466 is an apocalyptic number.

81141471466 is a deficient number, since it is larger than the sum of its proper divisors (52865446934).

81141471466 is a wasteful number, since it uses less digits than its factorization.

81141471466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62910.

The product of its digits is 129024, while the sum is 43.

The spelling of 81141471466 in words is "eighty-one billion, one hundred forty-one million, four hundred seventy-one thousand, four hundred sixty-six".