68157170741845 has 16 divisors (see below), whose sum is σ = 82378634748480. Its totient is φ = 54132398809344.

The previous prime is 68157170741819. The next prime is 68157170741879. The reversal of 68157170741845 is 54814707175186.

It is a cyclic number.

It is not a de Polignac number, because 68157170741845 - 2¹⁵ = 68157170709077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35323254 + ... + 37202776.

It is an arithmetic number, because the mean of its divisors is an integer number (5148664671780).

Almost surely, 2^{68157170741845} is an apocalyptic number.

It is an amenable number.

68157170741845 is a deficient number, since it is larger than the sum of its proper divisors (14221464006635).

68157170741845 is a wasteful number, since it uses less digits than its factorization.

68157170741845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931844.

The product of its (nonzero) digits is 52684800, while the sum is 64.

The spelling of 68157170741845 in words is "sixty-eight trillion, one hundred fifty-seven billion, one hundred seventy million, seven hundred forty-one thousand, eight hundred forty-five".