678173513472 has 1584 divisors, whose sum is σ = 2737373365440. Its totient is φ = 162533081088.

The previous prime is 678173513401. The next prime is 678173513527. The reversal of 678173513472 is 274315371876.

678173513472 is a `hidden beast` number, since 6 + 7 + 81 + 7 + 3 + 513 + 47 + 2 = 666.

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

Its product of digits (5927040) is a multiple of the sum of its prime factors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 175 ways as a sum of consecutive naturals, for example, 23385293554 + ... + 23385293582.

Almost surely, 2^678173513472 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 678173513472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368686682720).

678173513472 is an abundant number, since it is smaller than the sum of its proper divisors (2059199851968).

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

678173513472 is an equidigital number, since it uses as much as digits as its factorization.

678173513472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 71 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The spelling of 678173513472 in words is "six hundred seventy-eight billion, one hundred seventy-three million, five hundred thirteen thousand, four hundred seventy-two".