81360206318 has 16 divisors (see below), whose sum is σ = 128500056720. Its totient is φ = 38528073216.

The previous prime is 81360206251. The next prime is 81360206321.

81360206318 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168755 + ... + 437262.

It is an arithmetic number, because the mean of its divisors is an integer number (8031253545).

Almost surely, 2^81360206318 is an apocalyptic number.

81360206318 is a deficient number, since it is larger than the sum of its proper divisors (47139850402).

81360206318 is a wasteful number, since it uses less digits than its factorization.

81360206318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609571.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 81360206318 in words is "eighty-one billion, three hundred sixty million, two hundred six thousand, three hundred eighteen".