683561297920 has 48 divisors (see below), whose sum is σ = 1640146615380. Its totient is φ = 273424515072.

The previous prime is 683561297917. The next prime is 683561297957. The reversal of 683561297920 is 29792165386.

It can be written as a sum of positive squares in 2 ways, for example, as 670721688576 + 12839609344 = 818976^2 + 113312^2 .

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, 33366777 + ... + 33387256.

Almost surely, 2^683561297920 is an apocalyptic number.

It is an amenable number.

683561297920 is an abundant number, since it is smaller than the sum of its proper divisors (956585317460).

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

683561297920 is an equidigital number, since it uses as much as digits as its factorization.

683561297920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66754060 (or 66754040 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 683561297920 in words is "six hundred eighty-three billion, five hundred sixty-one million, two hundred ninety-seven thousand, nine hundred twenty".