78195945 has 32 divisors (see below), whose sum is σ = 128304000. Its totient is φ = 40653824.

The previous prime is 78195863. The next prime is 78195947. The reversal of 78195945 is 54959187.

It is a cyclic number.

It is not a de Polignac number, because 78195945 - 2⁹ = 78195433 is a prime.

It is a super-2 number, since 2×78195945² = 12229211628886050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78195894 and 78195903.

It is not an unprimeable number, because it can be changed into a prime (78195947) by changing a digit.

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, 131569 + ... + 132161.

It is an arithmetic number, because the mean of its divisors is an integer number (4009500).

Almost surely, 2^78195945 is an apocalyptic number.

It is an amenable number.

78195945 is a deficient number, since it is larger than the sum of its proper divisors (50108055).

78195945 is a wasteful number, since it uses less digits than its factorization.

78195945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its digits is 453600, while the sum is 48.

The square root of 78195945 is about 8842.8471093873. The cubic root of 78195945 is about 427.6233493789.

The spelling of 78195945 in words is "seventy-eight million, one hundred ninety-five thousand, nine hundred forty-five".