678842686249596 has 240 divisors, whose sum is σ = 1940488010512128. Its totient is φ = 205228972166400.

The previous prime is 678842686249589. The next prime is 678842686249619. The reversal of 678842686249596 is 695942686248876.

678842686249596 is a `hidden beast` number, since 6 + 7 + 8 + 8 + 4 + 2 + 6 + 8 + 6 + 2 + 4 + 9 + 596 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4499057571 + ... + 4499208453.

Almost surely, 2^{678842686249596} is an apocalyptic number.

678842686249596 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678842686249596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970244005256064).

678842686249596 is an abundant number, since it is smaller than the sum of its proper divisors (1261645324262532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678842686249596 is a wasteful number, since it uses less digits than its factorization.

678842686249596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153854 (or 153843 counting only the distinct ones).

The product of its digits is 120394874880, while the sum is 90.

The spelling of 678842686249596 in words is "six hundred seventy-eight trillion, eight hundred forty-two billion, six hundred eighty-six million, two hundred forty-nine thousand, five hundred ninety-six".