851171885677 has 16 divisors (see below), whose sum is σ = 856868544000. Its totient is φ = 845495647360.

The previous prime is 851171885657. The next prime is 851171885689. The reversal of 851171885677 is 776588171158.

It is a cyclic number.

It is not a de Polignac number, because 851171885677 - 2⁷ = 851171885549 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 (851171885617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306506313 + ... + 306509089.

It is an arithmetic number, because the mean of its divisors is an integer number (53554284000).

Almost surely, 2^851171885677 is an apocalyptic number.

It is an amenable number.

851171885677 is a deficient number, since it is larger than the sum of its proper divisors (5696658323).

851171885677 is a wasteful number, since it uses less digits than its factorization.

851171885677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756.

The product of its digits is 26342400, while the sum is 64.

The spelling of 851171885677 in words is "eight hundred fifty-one billion, one hundred seventy-one million, eight hundred eighty-five thousand, six hundred seventy-seven".