869287886181 has 24 divisors (see below), whose sum is σ = 1475155202976. Its totient is φ = 486314900640.

The previous prime is 869287886161. The next prime is 869287886189. The reversal of 869287886181 is 181688782968.

It is not a de Polignac number, because 869287886181 - 2⁵ = 869287886149 is a prime.

It is a super-2 number, since 2×869287886181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869287886189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337717395 + ... + 337719968.

It is an arithmetic number, because the mean of its divisors is an integer number (61464800124).

Almost surely, 2^869287886181 is an apocalyptic number.

It is an amenable number.

869287886181 is a deficient number, since it is larger than the sum of its proper divisors (605867316795).

869287886181 is a wasteful number, since it uses less digits than its factorization.

869287886181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675437393 (or 675437390 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 72.

The spelling of 869287886181 in words is "eight hundred sixty-nine billion, two hundred eighty-seven million, eight hundred eighty-six thousand, one hundred eighty-one".