68874608785 has 4 divisors (see below), whose sum is σ = 82649530548. Its totient is φ = 55099687024.

The previous prime is 68874608783. The next prime is 68874608791. The reversal of 68874608785 is 58780647886.

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 37856706624 + 31017902161 = 194568^2 + 176119^2 .

It is a cyclic number.

It is not a de Polignac number, because 68874608785 - 2¹ = 68874608783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68874608785.

It is not an unprimeable number, because it can be changed into a prime (68874608783) 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 3 ways as a sum of consecutive naturals, for example, 6887460874 + ... + 6887460883.

It is an arithmetic number, because the mean of its divisors is an integer number (20662382637).

Almost surely, 2^68874608785 is an apocalyptic number.

It is an amenable number.

68874608785 is a deficient number, since it is larger than the sum of its proper divisors (13774921763).

68874608785 is a wasteful number, since it uses less digits than its factorization.

68874608785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13774921762.

The product of its (nonzero) digits is 144506880, while the sum is 67.

The spelling of 68874608785 in words is "sixty-eight billion, eight hundred seventy-four million, six hundred eight thousand, seven hundred eighty-five".