678796545 has 16 divisors (see below), whose sum is σ = 1241228160. Its totient is φ = 310306944.

The previous prime is 678796541. The next prime is 678796571. The reversal of 678796545 is 545697876.

It is not a de Polignac number, because 678796545 - 2² = 678796541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678796541) 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, 3232260 + ... + 3232469.

It is an arithmetic number, because the mean of its divisors is an integer number (77576760).

Almost surely, 2^678796545 is an apocalyptic number.

It is an amenable number.

678796545 is a deficient number, since it is larger than the sum of its proper divisors (562431615).

678796545 is a wasteful number, since it uses less digits than its factorization.

678796545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464744.

The product of its digits is 12700800, while the sum is 57.

The square root of 678796545 is about 26053.7242059557. The cubic root of 678796545 is about 878.8468646995.

The spelling of 678796545 in words is "six hundred seventy-eight million, seven hundred ninety-six thousand, five hundred forty-five".