680305476338 has 4 divisors (see below), whose sum is σ = 1020458214510. Its totient is φ = 340152738168.

The previous prime is 680305476337. The next prime is 680305476421. The reversal of 680305476338 is 833674503086.

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., 544176208489 + 136129267849 = 737683^2 + 368957^2 .

It is a super-2 number, since 2×680305476338² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 680305476338.

It is not an unprimeable number, because it can be changed into a prime (680305476337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170076369083 + ... + 170076369086.

Almost surely, 2^680305476338 is an apocalyptic number.

680305476338 is a deficient number, since it is larger than the sum of its proper divisors (340152738172).

680305476338 is a wasteful number, since it uses less digits than its factorization.

680305476338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340152738171.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 680305476338 in words is "six hundred eighty billion, three hundred five million, four hundred seventy-six thousand, three hundred thirty-eight".