68789251085 has 4 divisors (see below), whose sum is σ = 82547101308. Its totient is φ = 55031400864.

The previous prime is 68789251073. The next prime is 68789251103. The reversal of 68789251085 is 58015298786.

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 38991241444 + 29798009641 = 197462^2 + 172621^2 .

It is a cyclic number.

It is not a de Polignac number, because 68789251085 - 2¹² = 68789246989 is a prime.

It is a super-2 number, since 2×68789251085² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6878925104 + ... + 6878925113.

It is an arithmetic number, because the mean of its divisors is an integer number (20636775327).

Almost surely, 2^68789251085 is an apocalyptic number.

It is an amenable number.

68789251085 is a deficient number, since it is larger than the sum of its proper divisors (13757850223).

68789251085 is a wasteful number, since it uses less digits than its factorization.

68789251085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13757850222.

The product of its (nonzero) digits is 9676800, while the sum is 59.

The spelling of 68789251085 in words is "sixty-eight billion, seven hundred eighty-nine million, two hundred fifty-one thousand, eighty-five".