78168105 has 16 divisors (see below), whose sum is σ = 138965760. Its totient is φ = 41689584.

The previous prime is 78168073. The next prime is 78168107. The reversal of 78168105 is 50186187.

It is not a de Polignac number, because 78168105 - 2⁵ = 78168073 is a prime.

It is a super-2 number, since 2×78168105² = 12220505278582050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78168105.

It is not an unprimeable number, because it can be changed into a prime (78168107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289377 + ... + 289646.

It is an arithmetic number, because the mean of its divisors is an integer number (8685360).

Almost surely, 2^78168105 is an apocalyptic number.

It is an amenable number.

78168105 is a deficient number, since it is larger than the sum of its proper divisors (60797655).

78168105 is a wasteful number, since it uses less digits than its factorization.

78168105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579037 (or 579031 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 78168105 is about 8841.2728156075. The cubic root of 78168105 is about 427.5725946279.

It can be divided in two parts, 781 and 68105, that added together give a palindrome (68886).

The spelling of 78168105 in words is "seventy-eight million, one hundred sixty-eight thousand, one hundred five".