81105469382 has 8 divisors (see below), whose sum is σ = 139037947536. Its totient is φ = 34759486872.

The previous prime is 81105469363. The next prime is 81105469397. The reversal of 81105469382 is 28396450118.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2896623893 + ... + 2896623920.

It is an arithmetic number, because the mean of its divisors is an integer number (17379743442).

Almost surely, 2^81105469382 is an apocalyptic number.

81105469382 is a deficient number, since it is larger than the sum of its proper divisors (57932478154).

81105469382 is a wasteful number, since it uses less digits than its factorization.

81105469382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5793247822.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 81105469382 in words is "eighty-one billion, one hundred five million, four hundred sixty-nine thousand, three hundred eighty-two".