678523616 has 24 divisors (see below), whose sum is σ = 1336822704. Its totient is φ = 339013120.

The previous prime is 678523609. The next prime is 678523619. The reversal of 678523616 is 616325876.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678523619) 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 3 ways as a sum of consecutive naturals, for example, 41336 + ... + 55368.

It is an arithmetic number, because the mean of its divisors is an integer number (55700946).

Almost surely, 2^678523616 is an apocalyptic number.

It is an amenable number.

678523616 is a deficient number, since it is larger than the sum of its proper divisors (658299088).

678523616 is a wasteful number, since it uses less digits than its factorization.

678523616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15554 (or 15546 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 678523616 is about 26048.4858677045. The cubic root of 678523616 is about 878.7290606472.

The spelling of 678523616 in words is "six hundred seventy-eight million, five hundred twenty-three thousand, six hundred sixteen".