85684121887 has 8 divisors (see below), whose sum is σ = 105457380896. Its totient is φ = 67794030432.

The previous prime is 85684121867. The next prime is 85684121891. The reversal of 85684121887 is 78812148658.

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 85684121887 - 2⁷ = 85684121759 is a prime.

It is a super-3 number, since 3×85684121887³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85684121827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470791788 + ... + 470791969.

It is an arithmetic number, because the mean of its divisors is an integer number (13182172612).

Almost surely, 2^85684121887 is an apocalyptic number.

85684121887 is a deficient number, since it is larger than the sum of its proper divisors (19773259009).

85684121887 is a wasteful number, since it uses less digits than its factorization.

85684121887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941583777.

The product of its digits is 6881280, while the sum is 58.

The spelling of 85684121887 in words is "eighty-five billion, six hundred eighty-four million, one hundred twenty-one thousand, eight hundred eighty-seven".