6868161785 has 8 divisors (see below), whose sum is σ = 8525994120. Its totient is φ = 5305062784.

The previous prime is 6868161779. The next prime is 6868161791. The reversal of 6868161785 is 5871618686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6868161779) and next prime (6868161791).

It can be written as a sum of positive squares in 4 ways, for example, as 258309184 + 6609852601 = 16072^2 + 81301^2 .

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-6868161785 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6868161785.

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, 23683172 + ... + 23683461.

It is an arithmetic number, because the mean of its divisors is an integer number (1065749265).

Almost surely, 2^6868161785 is an apocalyptic number.

It is an amenable number.

6868161785 is a deficient number, since it is larger than the sum of its proper divisors (1657832335).

6868161785 is a wasteful number, since it uses less digits than its factorization.

6868161785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47366667.

The product of its digits is 3870720, while the sum is 56.

The square root of 6868161785 is about 82874.3735119609. The cubic root of 6868161785 is about 1900.8455871463.

The spelling of 6868161785 in words is "six billion, eight hundred sixty-eight million, one hundred sixty-one thousand, seven hundred eighty-five".