678097654497 has 48 divisors (see below), whose sum is σ = 1023710478336. Its totient is φ = 432017820000.

The previous prime is 678097654477. The next prime is 678097654501. The reversal of 678097654497 is 794456790876.

678097654497 is a `hidden beast` number, since 6 + 7 + 8 + 0 + 9 + 76 + 544 + 9 + 7 = 666.

It is not a de Polignac number, because 678097654497 - 2¹⁹ = 678097130209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678097654417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66015472 + ... + 66025742.

It is an arithmetic number, because the mean of its divisors is an integer number (21327301632).

Almost surely, 2^678097654497 is an apocalyptic number.

It is an amenable number.

678097654497 is a deficient number, since it is larger than the sum of its proper divisors (345612823839).

678097654497 is a wasteful number, since it uses less digits than its factorization.

678097654497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13242 (or 13239 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 72.

The spelling of 678097654497 in words is "six hundred seventy-eight billion, ninety-seven million, six hundred fifty-four thousand, four hundred ninety-seven".