678722475312 has 480 divisors, whose sum is σ = 2315951769600. Its totient is φ = 189701180928.

The previous prime is 678722475311. The next prime is 678722475433. The reversal of 678722475312 is 213574227876.

It is a happy number.

678722475312 is a `hidden beast` number, since 6 + 7 + 87 + 2 + 24 + 7 + 531 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (678722475311) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278506158 + ... + 278508594.

It is an arithmetic number, because the mean of its divisors is an integer number (4824899520).

Almost surely, 2^678722475312 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 678722475312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157975884800).

678722475312 is an abundant number, since it is smaller than the sum of its proper divisors (1637229294288).

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

678722475312 is a wasteful number, since it uses less digits than its factorization.

678722475312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750 (or 2731 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The spelling of 678722475312 in words is "six hundred seventy-eight billion, seven hundred twenty-two million, four hundred seventy-five thousand, three hundred twelve".