678888495542 has 8 divisors (see below), whose sum is σ = 1022389846632. Its totient is φ = 338091880000.

The previous prime is 678888495503. The next prime is 678888495557. The reversal of 678888495542 is 245594888876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 678888495542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676183259 + ... + 676184262.

It is an arithmetic number, because the mean of its divisors is an integer number (127798730829).

Almost surely, 2^678888495542 is an apocalyptic number.

678888495542 is a deficient number, since it is larger than the sum of its proper divisors (343501351090).

678888495542 is a wasteful number, since it uses less digits than its factorization.

678888495542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352367774.

The product of its digits is 1238630400, while the sum is 74.

The spelling of 678888495542 in words is "six hundred seventy-eight billion, eight hundred eighty-eight million, four hundred ninety-five thousand, five hundred forty-two".