684260473122 has 90 divisors (see below), whose sum is σ = 1629173029473. Its totient is φ = 214613800128.

The previous prime is 684260473111. The next prime is 684260473123. The reversal of 684260473122 is 221374062486.

It is a happy number.

684260473122 is a `hidden beast` number, since 6 + 8 + 4 + 2 + 604 + 7 + 31 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 626252232321 + 58008240801 = 791361^2 + 240849^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=584919.

It is not an unprimeable number, because it can be changed into a prime (684260473123) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 178983303 + ... + 178987125.

Almost surely, 2^684260473122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684260473122

684260473122 is an abundant number, since it is smaller than the sum of its proper divisors (944912556351).

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

684260473122 is an frugal number, since it uses more digits than its factorization.

684260473122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694 (or 3845 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 684260473122 in words is "six hundred eighty-four billion, two hundred sixty million, four hundred seventy-three thousand, one hundred twenty-two".