678050139844 has 81 divisors (see below), whose sum is σ = 1517491036719. Its totient is φ = 264125972880.

The previous prime is 678050139773. The next prime is 678050139869. The reversal of 678050139844 is 448931050876.

The square root of 678050139844 is 823438.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 126806779 + ... + 126812125.

Almost surely, 2^678050139844 is an apocalyptic number.

678050139844 is the 823438-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678050139844

678050139844 is an abundant number, since it is smaller than the sum of its proper divisors (839440896875).

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

678050139844 is an equidigital number, since it uses as much as digits as its factorization.

678050139844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734 (or 5367 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 678050139844 in words is "six hundred seventy-eight billion, fifty million, one hundred thirty-nine thousand, eight hundred forty-four".