680424061738 has 4 divisors (see below), whose sum is σ = 1020636092610. Its totient is φ = 340212030868.

The previous prime is 680424061703. The next prime is 680424061741. The reversal of 680424061738 is 837160424086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 666546514929 + 13877546809 = 816423^2 + 117803^2 .

It is a junction number, because it is equal to n+sod(n) for n = 680424061691 and 680424061700.

It is an unprimeable number.

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, 170106015433 + ... + 170106015436.

Almost surely, 2^680424061738 is an apocalyptic number.

680424061738 is a deficient number, since it is larger than the sum of its proper divisors (340212030872).

680424061738 is a wasteful number, since it uses less digits than its factorization.

680424061738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340212030871.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 680424061738 in words is "six hundred eighty billion, four hundred twenty-four million, sixty-one thousand, seven hundred thirty-eight".