678706013980624 has 80 divisors (see below), whose sum is σ = 1516914436226688. Its totient is φ = 288151741495296.

The previous prime is 678706013980619. The next prime is 678706013980679. The reversal of 678706013980624 is 426089310607876.

It is a Sastry number since concatenated with its successor gives a square.

It is a self number, because there is not a number n which added to its sum of digits gives 678706013980624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020620524 + ... + 1021285300.

Almost surely, 2^{678706013980624} is an apocalyptic number.

It is an amenable number.

678706013980624 is an abundant number, since it is smaller than the sum of its proper divisors (838208422246064).

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

678706013980624 is a wasteful number, since it uses less digits than its factorization.

678706013980624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750092 (or 750086 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 678706013980624 in words is "six hundred seventy-eight trillion, seven hundred six billion, thirteen million, nine hundred eighty thousand, six hundred twenty-four".