78195465 has 12 divisors (see below), whose sum is σ = 135538884. Its totient is φ = 41704224.

The previous prime is 78195463. The next prime is 78195479. The reversal of 78195465 is 56459187.

It can be written as a sum of positive squares in 2 ways, for example, as 53275401 + 24920064 = 7299^2 + 4992^2 .

It is not a de Polignac number, because 78195465 - 2¹ = 78195463 is a prime.

It is a super-2 number, since 2×78195465² = 12229061493132450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1737677 = 78195465 / (7 + 8 + 1 + 9 + 5 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 78195465.

It is not an unprimeable number, because it can be changed into a prime (78195463) 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 11 ways as a sum of consecutive naturals, for example, 868794 + ... + 868883.

It is an arithmetic number, because the mean of its divisors is an integer number (11294907).

Almost surely, 2^78195465 is an apocalyptic number.

It is an amenable number.

78195465 is a deficient number, since it is larger than the sum of its proper divisors (57343419).

78195465 is a wasteful number, since it uses less digits than its factorization.

78195465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737688 (or 1737685 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 78195465 is about 8842.8199687656. The cubic root of 78195465 is about 427.6224743991.

The spelling of 78195465 in words is "seventy-eight million, one hundred ninety-five thousand, four hundred sixty-five".