684378514689 has 8 divisors (see below), whose sum is σ = 912689760672. Its totient is φ = 456159805920.

The previous prime is 684378514601. The next prime is 684378514723. The reversal of 684378514689 is 986415873486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 684378514689 - 2¹² = 684378510593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684378534689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23117044 + ... + 23146629.

It is an arithmetic number, because the mean of its divisors is an integer number (114086220084).

Almost surely, 2^684378514689 is an apocalyptic number.

It is an amenable number.

684378514689 is a deficient number, since it is larger than the sum of its proper divisors (228311245983).

684378514689 is a wasteful number, since it uses less digits than its factorization.

684378514689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46268607.

The product of its digits is 278691840, while the sum is 69.

The spelling of 684378514689 in words is "six hundred eighty-four billion, three hundred seventy-eight million, five hundred fourteen thousand, six hundred eighty-nine".