68169845 has 8 divisors (see below), whose sum is σ = 81860280. Its totient is φ = 54498240.

The previous prime is 68169841. The next prime is 68169859. The reversal of 68169845 is 54896186.

It can be written as a sum of positive squares in 4 ways, for example, as 36168196 + 32001649 = 6014^2 + 5657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68169845 - 2² = 68169841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68169845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68169841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135 + ... + 12755.

It is an arithmetic number, because the mean of its divisors is an integer number (10232535).

Almost surely, 2^68169845 is an apocalyptic number.

It is an amenable number.

68169845 is a deficient number, since it is larger than the sum of its proper divisors (13690435).

68169845 is a wasteful number, since it uses less digits than its factorization.

68169845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9415.

The product of its digits is 414720, while the sum is 47.

The square root of 68169845 is about 8256.5031944522. The cubic root of 68169845 is about 408.5050554515.

It can be divided in two parts, 6816 and 9845, that added together give a palindrome (16661).

The spelling of 68169845 in words is "sixty-eight million, one hundred sixty-nine thousand, eight hundred forty-five".