678078647727 has 16 divisors (see below), whose sum is σ = 986989086048. Its totient is φ = 411563013120.

The previous prime is 678078647699. The next prime is 678078647761. The reversal of 678078647727 is 727746870876.

It is a de Polignac number, because none of the positive numbers 2^k-678078647727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678078647327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119083674 + ... + 119089367.

It is an arithmetic number, because the mean of its divisors is an integer number (61686817878).

Almost surely, 2^678078647727 is an apocalyptic number.

678078647727 is a deficient number, since it is larger than the sum of its proper divisors (308910438321).

678078647727 is a wasteful number, since it uses less digits than its factorization.

678078647727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238173130.

The product of its (nonzero) digits is 309786624, while the sum is 69.

The spelling of 678078647727 in words is "six hundred seventy-eight billion, seventy-eight million, six hundred forty-seven thousand, seven hundred twenty-seven".