68780851 has 4 divisors (see below), whose sum is σ = 68805000. Its totient is φ = 68756704.

The previous prime is 68780849. The next prime is 68780863. The reversal of 68780851 is 15808786.

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

It is a cyclic number.

It is not a de Polignac number, because 68780851 - 2¹ = 68780849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68780798 and 68780807.

It is not an unprimeable number, because it can be changed into a prime (68780801) by changing a digit.

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, 7126 + ... + 13723.

It is an arithmetic number, because the mean of its divisors is an integer number (17201250).

Almost surely, 2^68780851 is an apocalyptic number.

68780851 is a deficient number, since it is larger than the sum of its proper divisors (24149).

68780851 is a wasteful number, since it uses less digits than its factorization.

68780851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24148.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 68780851 is about 8293.4221525255. The cubic root of 68780851 is about 409.7219034228.

The spelling of 68780851 in words is "sixty-eight million, seven hundred eighty thousand, eight hundred fifty-one".