678898547712 has 1408 divisors, whose sum is σ = 2640115138560. Its totient is φ = 169305292800.

The previous prime is 678898547711. The next prime is 678898547731. The reversal of 678898547712 is 217745898876.

678898547712 is a `hidden beast` number, since 6 + 7 + 8 + 8 + 9 + 8 + 547 + 71 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678898547711) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5345657793 + ... + 5345657919.

Almost surely, 2^678898547712 is an apocalyptic number.

678898547712 is a gapful number since it is divisible by the number (62) 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 678898547712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320057569280).

678898547712 is an abundant number, since it is smaller than the sum of its proper divisors (1961216590848).

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

678898547712 is a wasteful number, since it uses less digits than its factorization.

678898547712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 181 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 72.

The spelling of 678898547712 in words is "six hundred seventy-eight billion, eight hundred ninety-eight million, five hundred forty-seven thousand, seven hundred twelve".