81140395607713 has 8 divisors (see below), whose sum is σ = 87704407177856. Its totient is φ = 74622447277200.

The previous prime is 81140395607671. The next prime is 81140395607737. The reversal of 81140395607713 is 31770659304118.

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

It is a cyclic number.

It is not a de Polignac number, because 81140395607713 - 2¹⁷ = 81140395476641 is a prime.

It is a super-2 number, since 2×81140395607713² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81140395607753) by changing a digit.

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, 11515806243 + ... + 11515813288.

It is an arithmetic number, because the mean of its divisors is an integer number (10963050897232).

Almost surely, 2^{81140395607713} is an apocalyptic number.

It is an amenable number.

81140395607713 is a deficient number, since it is larger than the sum of its proper divisors (6564011570143).

81140395607713 is a wasteful number, since it uses less digits than its factorization.

81140395607713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23031619815.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 81140395607713 in words is "eighty-one trillion, one hundred forty billion, three hundred ninety-five million, six hundred seven thousand, seven hundred thirteen".