85708050667721 has 16 divisors (see below), whose sum is σ = 88708802396160. Its totient is φ = 82722059980560.

The previous prime is 85708050667703. The next prime is 85708050667741. The reversal of 85708050667721 is 12776605080758.

It is a de Polignac number, because none of the positive numbers 2^k-85708050667721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85708050667741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521373686 + ... + 521538048.

It is an arithmetic number, because the mean of its divisors is an integer number (5544300149760).

Almost surely, 2^{85708050667721} is an apocalyptic number.

It is an amenable number.

85708050667721 is a deficient number, since it is larger than the sum of its proper divisors (3000751728439).

85708050667721 is a wasteful number, since it uses less digits than its factorization.

85708050667721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209156.

The product of its (nonzero) digits is 39513600, while the sum is 62.

The spelling of 85708050667721 in words is "eighty-five trillion, seven hundred eight billion, fifty million, six hundred sixty-seven thousand, seven hundred twenty-one".