68687716285 has 8 divisors (see below), whose sum is σ = 82512858456. Its totient is φ = 54891773760.

The previous prime is 68687716261. The next prime is 68687716303. The reversal of 68687716285 is 58261778686.

It can be written as a sum of positive squares in 4 ways, for example, as 2223782649 + 66463933636 = 47157^2 + 257806^2 .

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

It is not a de Polignac number, because 68687716285 - 2¹⁹ = 68687191997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7294734 + ... + 7304143.

It is an arithmetic number, because the mean of its divisors is an integer number (10314107307).

Almost surely, 2^68687716285 is an apocalyptic number.

It is an amenable number.

68687716285 is a deficient number, since it is larger than the sum of its proper divisors (13825142171).

68687716285 is a wasteful number, since it uses less digits than its factorization.

68687716285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14599823.

The product of its digits is 54190080, while the sum is 64.

The spelling of 68687716285 in words is "sixty-eight billion, six hundred eighty-seven million, seven hundred sixteen thousand, two hundred eighty-five".