81304300340318 has 64 divisors (see below), whose sum is σ = 140122915027200. Its totient is φ = 34992120349440.

The previous prime is 81304300340287. The next prime is 81304300340407.

81304300340318 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×81304300340318² (a number of 29 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 8561046146 + ... + 8561055642.

It is an arithmetic number, because the mean of its divisors is an integer number (2189420547300).

Almost surely, 2^{81304300340318} is an apocalyptic number.

81304300340318 is a deficient number, since it is larger than the sum of its proper divisors (58818614686882).

81304300340318 is a wasteful number, since it uses less digits than its factorization.

81304300340318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18665.

The product of its (nonzero) digits is 82944, while the sum is 38.

It can be divided in two parts, 81304300 and 340318, that added together give a palindrome (81644618).

The spelling of 81304300340318 in words is "eighty-one trillion, three hundred four billion, three hundred million, three hundred forty thousand, three hundred eighteen".