678296769840 has 120 divisors (see below), whose sum is σ = 2280427599840. Its totient is φ = 180682140672.

The previous prime is 678296769793. The next prime is 678296769841. The reversal of 678296769840 is 48967692876.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (678296769841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149124 + ... + 1174236.

It is an arithmetic number, because the mean of its divisors is an integer number (19003563332).

Almost surely, 2^678296769840 is an apocalyptic number.

678296769840 is a gapful number since it is divisible by the number (60) 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 678296769840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140213799920).

678296769840 is an abundant number, since it is smaller than the sum of its proper divisors (1602130830000).

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

678296769840 is a wasteful number, since it uses less digits than its factorization.

678296769840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026051 (or 1026042 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 72.

The spelling of 678296769840 in words is "six hundred seventy-eight billion, two hundred ninety-six million, seven hundred sixty-nine thousand, eight hundred forty".