680913536 has 16 divisors (see below), whose sum is σ = 1356507690. Its totient is φ = 340456704.

The previous prime is 680913509. The next prime is 680913539. The reversal of 680913536 is 635319086.

It can be written as a sum of positive squares in only one way, i.e., 481539136 + 199374400 = 21944^2 + 14120^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 680913493 and 680913502.

It is not an unprimeable number, because it can be changed into a prime (680913539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2659691 + ... + 2659946.

Almost surely, 2^680913536 is an apocalyptic number.

It is an amenable number.

680913536 is a deficient number, since it is larger than the sum of its proper divisors (675594154).

680913536 is an equidigital number, since it uses as much as digits as its factorization.

680913536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319651 (or 5319639 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 680913536 is about 26094.3199949721. The cubic root of 680913536 is about 879.7595486301.

The spelling of 680913536 in words is "six hundred eighty million, nine hundred thirteen thousand, five hundred thirty-six".