678118763544 has 128 divisors (see below), whose sum is σ = 1857700915200. Its totient is φ = 205349713920.

The previous prime is 678118763533. The next prime is 678118763551. The reversal of 678118763544 is 445367811876.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4851159 + ... + 4988985.

It is an arithmetic number, because the mean of its divisors is an integer number (14513288400).

Almost surely, 2^678118763544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678118763544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928850457600).

678118763544 is an abundant number, since it is smaller than the sum of its proper divisors (1179582151656).

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

678118763544 is a wasteful number, since it uses less digits than its factorization.

678118763544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138273 (or 138269 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 60.

The spelling of 678118763544 in words is "six hundred seventy-eight billion, one hundred eighteen million, seven hundred sixty-three thousand, five hundred forty-four".