68263518 has 16 divisors (see below), whose sum is σ = 138450816. Its totient is φ = 22433880.

The previous prime is 68263513. The next prime is 68263543. The reversal of 68263518 is 81536286.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68263511) 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 7 ways as a sum of consecutive naturals, for example, 79696 + ... + 80547.

It is an arithmetic number, because the mean of its divisors is an integer number (8653176).

Almost surely, 2^68263518 is an apocalyptic number.

68263518 is an abundant number, since it is smaller than the sum of its proper divisors (70187298).

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

68263518 is a wasteful number, since it uses less digits than its factorization.

68263518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160319.

The product of its digits is 69120, while the sum is 39.

The square root of 68263518 is about 8262.1739270001. The cubic root of 68263518 is about 408.6920803754.

The spelling of 68263518 in words is "sixty-eight million, two hundred sixty-three thousand, five hundred eighteen".