684279891082 has 8 divisors (see below), whose sum is σ = 1026423874116. Its totient is φ = 342138599712.

The previous prime is 684279891037. The next prime is 684279891137. The reversal of 684279891082 is 280198972486.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 671024743921 + 13255147161 = 819161^2 + 115131^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177678 + ... + 1183270.

Almost surely, 2^684279891082 is an apocalyptic number.

684279891082 is a deficient number, since it is larger than the sum of its proper divisors (342143983034).

684279891082 is a wasteful number, since it uses less digits than its factorization.

684279891082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345832.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 684279891082 in words is "six hundred eighty-four billion, two hundred seventy-nine million, eight hundred ninety-one thousand, eighty-two".