684488810248 has 8 divisors (see below), whose sum is σ = 1283416519230. Its totient is φ = 342244405120.

The previous prime is 684488810197. The next prime is 684488810249. The reversal of 684488810248 is 842018884486.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 683297317924 + 1191492324 = 826618^2 + 34518^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (684488810249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42780550633 + ... + 42780550648.

Almost surely, 2^684488810248 is an apocalyptic number.

It is an amenable number.

684488810248 is a deficient number, since it is larger than the sum of its proper divisors (598927708982).

684488810248 is a wasteful number, since it uses less digits than its factorization.

684488810248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85561101287 (or 85561101283 counting only the distinct ones).

The product of its (nonzero) digits is 25165824, while the sum is 61.

The spelling of 684488810248 in words is "six hundred eighty-four billion, four hundred eighty-eight million, eight hundred ten thousand, two hundred forty-eight".