68549594585 has 4 divisors (see below), whose sum is σ = 82259513508. Its totient is φ = 54839675664.

The previous prime is 68549594551. The next prime is 68549594593. The reversal of 68549594585 is 58549594586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51861863824 + 16687730761 = 227732^2 + 129181^2 .

It is a cyclic number.

It is not a de Polignac number, because 68549594585 - 2¹⁶ = 68549529049 is a prime.

It is a super-2 number, since 2×68549594585² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6854959454 + ... + 6854959463.

It is an arithmetic number, because the mean of its divisors is an integer number (20564878377).

Almost surely, 2^68549594585 is an apocalyptic number.

It is an amenable number.

68549594585 is a deficient number, since it is larger than the sum of its proper divisors (13709918923).

68549594585 is a wasteful number, since it uses less digits than its factorization.

68549594585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13709918922.

The product of its digits is 311040000, while the sum is 68.

Subtracting from 68549594585 its reverse (58549594586), we obtain a palindrome (9999999999).

The spelling of 68549594585 in words is "sixty-eight billion, five hundred forty-nine million, five hundred ninety-four thousand, five hundred eighty-five".