68447755 has 4 divisors (see below), whose sum is σ = 82137312. Its totient is φ = 54758200.

The previous prime is 68447719. The next prime is 68447773. The reversal of 68447755 is 55774486.

It is a happy number.

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

It is not a de Polignac number, because 68447755 - 2¹³ = 68439563 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 6844771 + ... + 6844780.

It is an arithmetic number, because the mean of its divisors is an integer number (20534328).

Almost surely, 2^68447755 is an apocalyptic number.

68447755 is a deficient number, since it is larger than the sum of its proper divisors (13689557).

68447755 is a wasteful number, since it uses less digits than its factorization.

68447755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13689556.

The product of its digits is 940800, while the sum is 46.

The square root of 68447755 is about 8273.3158407014. The cubic root of 68447755 is about 409.0594242959.

The spelling of 68447755 in words is "sixty-eight million, four hundred forty-seven thousand, seven hundred fifty-five".