678120021876 has 96 divisors (see below), whose sum is σ = 1806277874688. Its totient is φ = 195999400960.

The previous prime is 678120021871. The next prime is 678120021893.

678120021876 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678120021871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755335 + ... + 1388081.

It is an arithmetic number, because the mean of its divisors is an integer number (18815394528).

Almost surely, 2^678120021876 is an apocalyptic number.

678120021876 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 678120021876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903138937344).

678120021876 is an abundant number, since it is smaller than the sum of its proper divisors (1128157852812).

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

678120021876 is a wasteful number, since it uses less digits than its factorization.

678120021876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633141 (or 633139 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 678120021876 in words is "six hundred seventy-eight billion, one hundred twenty million, twenty-one thousand, eight hundred seventy-six".