85807681705321 has 8 divisors (see below), whose sum is σ = 86093468472704. Its totient is φ = 85521935736720.

The previous prime is 85807681705271. The next prime is 85807681705357. The reversal of 85807681705321 is 12350718670858.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85807681705321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85807681705321.

It is not an unprimeable number, because it can be changed into a prime (85807681705391) 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, 5983410 + ... + 14401963.

It is an arithmetic number, because the mean of its divisors is an integer number (10761683559088).

Almost surely, 2^{85807681705321} is an apocalyptic number.

It is an amenable number.

85807681705321 is a deficient number, since it is larger than the sum of its proper divisors (285786767383).

85807681705321 is a wasteful number, since it uses less digits than its factorization.

85807681705321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20399391.

The product of its (nonzero) digits is 22579200, while the sum is 61.

The spelling of 85807681705321 in words is "eighty-five trillion, eight hundred seven billion, six hundred eighty-one million, seven hundred five thousand, three hundred twenty-one".