68828613687 has 12 divisors (see below), whose sum is σ = 99423050584. Its totient is φ = 45883923120.

The previous prime is 68828613653. The next prime is 68828613701. The reversal of 68828613687 is 78631682886.

68828613687 is a `hidden beast` number, since 6 + 8 + 8 + 2 + 8 + 613 + 6 + 8 + 7 = 666.

It is not a de Polignac number, because 68828613687 - 2²⁰ = 68827565111 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 (68828612687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112137 + ... + 387597.

Almost surely, 2^68828613687 is an apocalyptic number.

68828613687 is a deficient number, since it is larger than the sum of its proper divisors (30594436897).

68828613687 is a wasteful number, since it uses less digits than its factorization.

68828613687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303230 (or 303227 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 68828613687 in words is "sixty-eight billion, eight hundred twenty-eight million, six hundred thirteen thousand, six hundred eighty-seven".