68051855 has 4 divisors (see below), whose sum is σ = 81662232. Its totient is φ = 54441480.

The previous prime is 68051827. The next prime is 68051857. The reversal of 68051855 is 55815086.

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

It is not a de Polignac number, because 68051855 - 2¹⁰ = 68050831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68051857) 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 3 ways as a sum of consecutive naturals, for example, 6805181 + ... + 6805190.

It is an arithmetic number, because the mean of its divisors is an integer number (20415558).

Almost surely, 2^68051855 is an apocalyptic number.

68051855 is a deficient number, since it is larger than the sum of its proper divisors (13610377).

68051855 is a wasteful number, since it uses less digits than its factorization.

68051855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13610376.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 68051855 is about 8249.3548232574. The cubic root of 68051855 is about 408.2692359013.

The spelling of 68051855 in words is "sixty-eight million, fifty-one thousand, eight hundred fifty-five".