78805045 has 16 divisors (see below), whose sum is σ = 103550400. Its totient is φ = 57097600.

The previous prime is 78805043. The next prime is 78805049. The reversal of 78805045 is 54050887.

It is not a de Polignac number, because 78805045 - 2¹ = 78805043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78804995 and 78805013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78805043) 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 15 ways as a sum of consecutive naturals, for example, 12906 + ... + 18004.

It is an arithmetic number, because the mean of its divisors is an integer number (6471900).

Almost surely, 2^78805045 is an apocalyptic number.

It is an amenable number.

78805045 is a deficient number, since it is larger than the sum of its proper divisors (24745355).

78805045 is a wasteful number, since it uses less digits than its factorization.

78805045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 78805045 is about 8877.2205672722. The cubic root of 78805045 is about 428.7307895979.

The spelling of 78805045 in words is "seventy-eight million, eight hundred five thousand, forty-five".