78189195 has 16 divisors (see below), whose sum is σ = 142974720. Its totient is φ = 35743584.

The previous prime is 78189187. The next prime is 78189203. The reversal of 78189195 is 59198187.

It is an interprime number because it is at equal distance from previous prime (78189187) and next prime (78189203).

It is not a de Polignac number, because 78189195 - 2³ = 78189187 is a prime.

It is a super-2 number, since 2×78189195² = 12227100429496050, which contains 22 as substring.

It is an unprimeable number.

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, 372225 + ... + 372434.

It is an arithmetic number, because the mean of its divisors is an integer number (8935920).

Almost surely, 2^78189195 is an apocalyptic number.

78189195 is a deficient number, since it is larger than the sum of its proper divisors (64785525).

78189195 is a wasteful number, since it uses less digits than its factorization.

78189195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744674.

The product of its digits is 181440, while the sum is 48.

The square root of 78189195 is about 8842.4654367433. The cubic root of 78189195 is about 427.6110446460.

The spelling of 78189195 in words is "seventy-eight million, one hundred eighty-nine thousand, one hundred ninety-five".