68319655 has 4 divisors (see below), whose sum is σ = 81983592. Its totient is φ = 54655720.

The previous prime is 68319613. The next prime is 68319661. The reversal of 68319655 is 55691386.

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

It is not a de Polignac number, because 68319655 - 2⁷ = 68319527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6831961 + ... + 6831970.

It is an arithmetic number, because the mean of its divisors is an integer number (20495898).

Almost surely, 2^68319655 is an apocalyptic number.

68319655 is a deficient number, since it is larger than the sum of its proper divisors (13663937).

68319655 is a wasteful number, since it uses less digits than its factorization.

68319655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13663936.

The product of its digits is 194400, while the sum is 43.

The square root of 68319655 is about 8265.5704582321. The cubic root of 68319655 is about 408.8040799803.

The spelling of 68319655 in words is "sixty-eight million, three hundred nineteen thousand, six hundred fifty-five".