67856865875 has 16 divisors (see below), whose sum is σ = 84768634080. Its totient is φ = 54232117600.

The previous prime is 67856865863. The next prime is 67856865893. The reversal of 67856865875 is 57856865876.

It is not a de Polignac number, because 67856865875 - 2¹⁰ = 67856864851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67856865799 and 67856865808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138992 + ... + 393741.

It is an arithmetic number, because the mean of its divisors is an integer number (5298039630).

Almost surely, 2^67856865875 is an apocalyptic number.

67856865875 is a deficient number, since it is larger than the sum of its proper divisors (16911768205).

67856865875 is a wasteful number, since it uses less digits than its factorization.

67856865875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533767 (or 533757 counting only the distinct ones).

The product of its digits is 677376000, while the sum is 71.

Subtracting from 67856865875 its reverse (57856865876), we obtain a palindrome (9999999999).

The spelling of 67856865875 in words is "sixty-seven billion, eight hundred fifty-six million, eight hundred sixty-five thousand, eight hundred seventy-five".