68658523687 has 8 divisors (see below), whose sum is σ = 73942028496. Its totient is φ = 63375316032.

The previous prime is 68658523649. The next prime is 68658523711. The reversal of 68658523687 is 78632585686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68658523687 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 (68658524687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720963 + ... + 810619.

It is an arithmetic number, because the mean of its divisors is an integer number (9242753562).

Almost surely, 2^68658523687 is an apocalyptic number.

68658523687 is a deficient number, since it is larger than the sum of its proper divisors (5283504809).

68658523687 is a wasteful number, since it uses less digits than its factorization.

68658523687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148577.

The product of its digits is 116121600, while the sum is 64.

The spelling of 68658523687 in words is "sixty-eight billion, six hundred fifty-eight million, five hundred twenty-three thousand, six hundred eighty-seven".