78164205 has 32 divisors (see below), whose sum is σ = 143837184. Its totient is φ = 35505216.

The previous prime is 78164173. The next prime is 78164213. The reversal of 78164205 is 50246187.

It is not a de Polignac number, because 78164205 - 2⁵ = 78164173 is a prime.

It is a super-2 number, since 2×78164205² = 12219285886564050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14832 + ... + 19398.

It is an arithmetic number, because the mean of its divisors is an integer number (4494912).

Almost surely, 2^78164205 is an apocalyptic number.

It is an amenable number.

78164205 is a deficient number, since it is larger than the sum of its proper divisors (65672979).

78164205 is a wasteful number, since it uses less digits than its factorization.

78164205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 78164205 is about 8841.0522563776. The cubic root of 78164205 is about 427.5654836250.

It can be divided in two parts, 7816 and 4205, that added together give a palindrome (12021).

The spelling of 78164205 in words is "seventy-eight million, one hundred sixty-four thousand, two hundred five".