81282164202274 has 16 divisors (see below), whose sum is σ = 140119293441600. Its totient is φ = 34640603098704.

The previous prime is 81282164202271. The next prime is 81282164202299. The reversal of 81282164202274 is 47220246128218.

It is not an unprimeable number, because it can be changed into a prime (81282164202271) 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 in 7 ways as a sum of consecutive naturals, for example, 16217508309 + ... + 16217513320.

It is an arithmetic number, because the mean of its divisors is an integer number (8757455840100).

Almost surely, 2^{81282164202274} is an apocalyptic number.

81282164202274 is a deficient number, since it is larger than the sum of its proper divisors (58837129239326).

81282164202274 is a wasteful number, since it uses less digits than its factorization.

81282164202274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32435021817.

The product of its (nonzero) digits is 1376256, while the sum is 49.

The spelling of 81282164202274 in words is "eighty-one trillion, two hundred eighty-two billion, one hundred sixty-four million, two hundred two thousand, two hundred seventy-four".