81760759697 has 8 divisors (see below), whose sum is σ = 85391981376. Its totient is φ = 78135905232.

The previous prime is 81760759693. The next prime is 81760759709. The reversal of 81760759697 is 79695706718.

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 81760759697 - 2² = 81760759693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81760759693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565543 + ... + 1616924.

It is an arithmetic number, because the mean of its divisors is an integer number (10673997672).

Almost surely, 2^81760759697 is an apocalyptic number.

It is an amenable number.

81760759697 is a deficient number, since it is larger than the sum of its proper divisors (3631221679).

81760759697 is a wasteful number, since it uses less digits than its factorization.

81760759697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183607.

The product of its (nonzero) digits is 40007520, while the sum is 65.

The spelling of 81760759697 in words is "eighty-one billion, seven hundred sixty million, seven hundred fifty-nine thousand, six hundred ninety-seven".