85777170891871 has 8 divisors (see below), whose sum is σ = 88735416541184. Its totient is φ = 82830877751160.

The previous prime is 85777170891779. The next prime is 85777170891913. The reversal of 85777170891871 is 17819807177758.

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 85777170891871 - 2⁷ = 85777170891743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85777170861871) 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, 2988112551 + ... + 2988141256.

It is an arithmetic number, because the mean of its divisors is an integer number (11091927067648).

Almost surely, 2^{85777170891871} is an apocalyptic number.

85777170891871 is a deficient number, since it is larger than the sum of its proper divisors (2958245649313).

85777170891871 is a wasteful number, since it uses less digits than its factorization.

85777170891871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976254301.

The product of its (nonzero) digits is 387233280, while the sum is 76.

The spelling of 85777170891871 in words is "eighty-five trillion, seven hundred seventy-seven billion, one hundred seventy million, eight hundred ninety-one thousand, eight hundred seventy-one".