68178541 has 4 divisors (see below), whose sum is σ = 69296284. Its totient is φ = 67060800.

The previous prime is 68178503. The next prime is 68178547. The reversal of 68178541 is 14587186.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15920100 + 52258441 = 3990^2 + 7229^2 .

It is a cyclic number.

It is not a de Polignac number, because 68178541 - 2¹⁵ = 68145773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68178494 and 68178503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68178547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558780 + ... + 558901.

It is an arithmetic number, because the mean of its divisors is an integer number (17324071).

Almost surely, 2^68178541 is an apocalyptic number.

68178541 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68178541 is a deficient number, since it is larger than the sum of its proper divisors (1117743).

68178541 is a wasteful number, since it uses less digits than its factorization.

68178541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117742.

The product of its digits is 53760, while the sum is 40.

The square root of 68178541 is about 8257.0297928492. The cubic root of 68178541 is about 408.5224248564.

The spelling of 68178541 in words is "sixty-eight million, one hundred seventy-eight thousand, five hundred forty-one".