81297612713 has 8 divisors (see below), whose sum is σ = 83081794176. Its totient is φ = 79522700400.

The previous prime is 81297612703. The next prime is 81297612779. The reversal of 81297612713 is 31721679218.

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 81297612713 - 2⁸ = 81297612457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81297612703) 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, 2299553 + ... + 2334638.

It is an arithmetic number, because the mean of its divisors is an integer number (10385224272).

Almost surely, 2^81297612713 is an apocalyptic number.

It is an amenable number.

81297612713 is a deficient number, since it is larger than the sum of its proper divisors (1784181463).

81297612713 is a wasteful number, since it uses less digits than its factorization.

81297612713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4634575.

The product of its digits is 254016, while the sum is 47.

The spelling of 81297612713 in words is "eighty-one billion, two hundred ninety-seven million, six hundred twelve thousand, seven hundred thirteen".