68194578 has 16 divisors (see below), whose sum is σ = 136858176. Its totient is φ = 22653360.

The previous prime is 68194561. The next prime is 68194579. The reversal of 68194578 is 87549186.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68194579) 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 7 ways as a sum of consecutive naturals, for example, 17638 + ... + 21153.

It is an arithmetic number, because the mean of its divisors is an integer number (8553636).

Almost surely, 2^68194578 is an apocalyptic number.

68194578 is an abundant number, since it is smaller than the sum of its proper divisors (68663598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68194578 is a wasteful number, since it uses less digits than its factorization.

68194578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39089.

The product of its digits is 483840, while the sum is 48.

The square root of 68194578 is about 8258.0008476628. Note that the first 3 decimals coincide. The cubic root of 68194578 is about 408.5544533139.

It can be divided in two parts, 681 and 94578, that added together give a palindrome (95259).

The spelling of 68194578 in words is "sixty-eight million, one hundred ninety-four thousand, five hundred seventy-eight".