78522945 has 32 divisors (see below), whose sum is σ = 131041152. Its totient is φ = 40115712.

The previous prime is 78522937. The next prime is 78522959. The reversal of 78522945 is 54922587.

It is not a de Polignac number, because 78522945 - 2³ = 78522937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78522897 and 78522906.

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 31 ways as a sum of consecutive naturals, for example, 33037 + ... + 35333.

It is an arithmetic number, because the mean of its divisors is an integer number (4095036).

Almost surely, 2^78522945 is an apocalyptic number.

It is an amenable number.

78522945 is a deficient number, since it is larger than the sum of its proper divisors (52518207).

78522945 is a wasteful number, since it uses less digits than its factorization.

78522945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its digits is 201600, while the sum is 42.

The square root of 78522945 is about 8861.3173399896. The cubic root of 78522945 is about 428.2185992096.

The spelling of 78522945 in words is "seventy-eight million, five hundred twenty-two thousand, nine hundred forty-five".