684684198345 has 48 divisors (see below), whose sum is σ = 1274911342848. Its totient is φ = 312860862720.

The previous prime is 684684198307. The next prime is 684684198349. The reversal of 684684198345 is 543891486486.

It is not a de Polignac number, because 684684198345 - 2¹¹ = 684684196297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (684684198349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1477285 + ... + 1884605.

It is an arithmetic number, because the mean of its divisors is an integer number (26560652976).

Almost surely, 2^684684198345 is an apocalyptic number.

It is an amenable number.

684684198345 is a deficient number, since it is larger than the sum of its proper divisors (590227144503).

684684198345 is a wasteful number, since it uses less digits than its factorization.

684684198345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409630 (or 409623 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 66.

The spelling of 684684198345 in words is "six hundred eighty-four billion, six hundred eighty-four million, one hundred ninety-eight thousand, three hundred forty-five".