81008178314 has 16 divisors (see below), whose sum is σ = 141825869568. Its totient is φ = 33979114032.

The previous prime is 81008178313. The next prime is 81008178331. The reversal of 81008178314 is 41387180018.

It is not an unprimeable number, because it can be changed into a prime (81008178313) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61555709 + ... + 61557024.

It is an arithmetic number, because the mean of its divisors is an integer number (8864116848).

Almost surely, 2^81008178314 is an apocalyptic number.

81008178314 is a deficient number, since it is larger than the sum of its proper divisors (60817691254).

81008178314 is a wasteful number, since it uses less digits than its factorization.

81008178314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123112789.

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 81008178314 in words is "eighty-one billion, eight million, one hundred seventy-eight thousand, three hundred fourteen".