684668716395 has 16 divisors (see below), whose sum is σ = 1095502117632. Its totient is φ = 365145924960.

The previous prime is 684668716393. The next prime is 684668716421. The reversal of 684668716395 is 593617866486.

It is not a de Polignac number, because 684668716395 - 2¹ = 684668716393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684668716393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128311 + ... + 1177200.

It is an arithmetic number, because the mean of its divisors is an integer number (68468882352).

Almost surely, 2^684668716395 is an apocalyptic number.

684668716395 is a deficient number, since it is larger than the sum of its proper divisors (410833401237).

684668716395 is a wasteful number, since it uses less digits than its factorization.

684668716395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340482.

The product of its digits is 313528320, while the sum is 69.

The spelling of 684668716395 in words is "six hundred eighty-four billion, six hundred sixty-eight million, seven hundred sixteen thousand, three hundred ninety-five".