68178855 has 16 divisors (see below), whose sum is σ = 112848480. Its totient is φ = 35107968.

The previous prime is 68178853. The next prime is 68178871. The reversal of 68178855 is 55887186.

It is not a de Polignac number, because 68178855 - 2¹ = 68178853 is a prime.

It is a super-2 number, since 2×68178855² = 9296712538222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68178853) 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, 77932 + ... + 78801.

It is an arithmetic number, because the mean of its divisors is an integer number (7053030).

Almost surely, 2^68178855 is an apocalyptic number.

68178855 is a deficient number, since it is larger than the sum of its proper divisors (44669625).

68178855 is a wasteful number, since it uses less digits than its factorization.

68178855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156770.

The product of its digits is 537600, while the sum is 48.

The square root of 68178855 is about 8257.0488069285. The cubic root of 68178855 is about 408.5230520129.

The spelling of 68178855 in words is "sixty-eight million, one hundred seventy-eight thousand, eight hundred fifty-five".