81363340382 has 16 divisors (see below), whose sum is σ = 129281203440. Its totient is φ = 38271719808.

The previous prime is 81363340381. The next prime is 81363340391. The reversal of 81363340382 is 28304336318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81363340381) 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 7 ways as a sum of consecutive naturals, for example, 450188 + ... + 604479.

It is an arithmetic number, because the mean of its divisors is an integer number (8080075215).

Almost surely, 2^81363340382 is an apocalyptic number.

81363340382 is a deficient number, since it is larger than the sum of its proper divisors (47917863058).

81363340382 is a wasteful number, since it uses less digits than its factorization.

81363340382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056955.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 81363340382 in words is "eighty-one billion, three hundred sixty-three million, three hundred forty thousand, three hundred eighty-two".