68171745 has 16 divisors (see below), whose sum is σ = 109910592. Its totient is φ = 36079680.

The previous prime is 68171743. The next prime is 68171749. The reversal of 68171745 is 54717186.

It is not a de Polignac number, because 68171745 - 2¹ = 68171743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68171743) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15382 + ... + 19311.

It is an arithmetic number, because the mean of its divisors is an integer number (6869412).

Almost surely, 2^68171745 is an apocalyptic number.

It is an amenable number.

68171745 is a deficient number, since it is larger than the sum of its proper divisors (41738847).

68171745 is a wasteful number, since it uses less digits than its factorization.

68171745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34832.

The product of its digits is 47040, while the sum is 39.

The square root of 68171745 is about 8256.6182544671. The cubic root of 68171745 is about 408.5088506407.

The spelling of 68171745 in words is "sixty-eight million, one hundred seventy-one thousand, seven hundred forty-five".