81726303760224 has 48 divisors (see below), whose sum is σ = 216614377953792. Its totient is φ = 26977614830208.

The previous prime is 81726303760207. The next prime is 81726303760271. The reversal of 81726303760224 is 42206730362718.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4132590424 + ... + 4132610199.

It is an arithmetic number, because the mean of its divisors is an integer number (4512799540704).

Almost surely, 2^{81726303760224} is an apocalyptic number.

It is an amenable number.

81726303760224 is an abundant number, since it is smaller than the sum of its proper divisors (134888074193568).

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

81726303760224 is a wasteful number, since it uses less digits than its factorization.

81726303760224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265200739 (or 8265200731 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 81726303760224 in words is "eighty-one trillion, seven hundred twenty-six billion, three hundred three million, seven hundred sixty thousand, two hundred twenty-four".