68194563 has 16 divisors (see below), whose sum is σ = 95178240. Its totient is φ = 43349504.

The previous prime is 68194561. The next prime is 68194579. The reversal of 68194563 is 36549186.

It is a Cunningham number, because it is equal to 8258²-1.

It is a cyclic number.

It is not a de Polignac number, because 68194563 - 2¹ = 68194561 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68194561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23395 + ... + 26147.

It is an arithmetic number, because the mean of its divisors is an integer number (5948640).

Almost surely, 2^68194563 is an apocalyptic number.

68194563 is a deficient number, since it is larger than the sum of its proper divisors (26983677).

68194563 is a wasteful number, since it uses less digits than its factorization.

68194563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138.

The product of its digits is 155520, while the sum is 42.

The square root of 68194563 is about 8257.9999394527. Note that the first 4 decimals coincide. The cubic root of 68194563 is about 408.5544233588.

The spelling of 68194563 in words is "sixty-eight million, one hundred ninety-four thousand, five hundred sixty-three".