81743831767326 has 32 divisors (see below), whose sum is σ = 168769361875968. Its totient is φ = 26367743185920.

The previous prime is 81743831767303. The next prime is 81743831767343. The reversal of 81743831767326 is 62376713834718.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6303220 + ... + 14255463.

It is an arithmetic number, because the mean of its divisors is an integer number (5274042558624).

Almost surely, 2^{81743831767326} is an apocalyptic number.

81743831767326 is an abundant number, since it is smaller than the sum of its proper divisors (87025530108642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81743831767326 is a wasteful number, since it uses less digits than its factorization.

81743831767326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20580096.

The product of its digits is 170698752, while the sum is 66.

The spelling of 81743831767326 in words is "eighty-one trillion, seven hundred forty-three billion, eight hundred thirty-one million, seven hundred sixty-seven thousand, three hundred twenty-six".