678840898365 has 192 divisors, whose sum is σ = 1481751936000. Its totient is φ = 293197968000.

The previous prime is 678840898349. The next prime is 678840898409. The reversal of 678840898365 is 563898048876.

678840898365 is a `hidden beast` number, since 6 + 7 + 88 + 408 + 9 + 83 + 65 = 666.

It is not a de Polignac number, because 678840898365 - 2⁴ = 678840898349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678840898293 and 678840898302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 47627490 + ... + 47641740.

It is an arithmetic number, because the mean of its divisors is an integer number (7717458000).

Almost surely, 2^678840898365 is an apocalyptic number.

It is an amenable number.

678840898365 is an abundant number, since it is smaller than the sum of its proper divisors (802911037635).

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

678840898365 is a wasteful number, since it uses less digits than its factorization.

678840898365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14677 (or 14664 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 72.

The spelling of 678840898365 in words is "six hundred seventy-eight billion, eight hundred forty million, eight hundred ninety-eight thousand, three hundred sixty-five".