81814438857614 has 8 divisors (see below), whose sum is σ = 122722160934648. Its totient is φ = 40907051879400.

The previous prime is 81814438857607. The next prime is 81814438857661. The reversal of 81814438857614 is 41675883441818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83163437 + ... + 84141464.

It is an arithmetic number, because the mean of its divisors is an integer number (15340270116831).

Almost surely, 2^{81814438857614} is an apocalyptic number.

81814438857614 is a deficient number, since it is larger than the sum of its proper divisors (40907722077034).

81814438857614 is a wasteful number, since it uses less digits than its factorization.

81814438857614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167549410.

The product of its digits is 165150720, while the sum is 68.

The spelling of 81814438857614 in words is "eighty-one trillion, eight hundred fourteen billion, four hundred thirty-eight million, eight hundred fifty-seven thousand, six hundred fourteen".