684048030650 has 24 divisors (see below), whose sum is σ = 1347172240860. Its totient is φ = 257523964160.

The previous prime is 684048030623. The next prime is 684048030707. The reversal of 684048030650 is 56030840486.

It can be written as a sum of positive squares in 6 ways, for example, as 470320268401 + 213727762249 = 685799^2 + 462307^2 .

It is a super-2 number, since 2×684048030650² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402380345 + ... + 402382044.

Almost surely, 2^684048030650 is an apocalyptic number.

684048030650 is a deficient number, since it is larger than the sum of its proper divisors (663124210210).

684048030650 is a wasteful number, since it uses less digits than its factorization.

684048030650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804762418 (or 804762413 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 684048030650 in words is "six hundred eighty-four billion, forty-eight million, thirty thousand, six hundred fifty".