681613226 has 12 divisors (see below), whose sum is σ = 1189345698. Its totient is φ = 292119912.

The previous prime is 681613217. The next prime is 681613243. The reversal of 681613226 is 622316186.

It can be written as a sum of positive squares in only one way, i.e., 493950625 + 187662601 = 22225^2 + 13699^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3477521 + ... + 3477716.

Almost surely, 2^681613226 is an apocalyptic number.

681613226 is a deficient number, since it is larger than the sum of its proper divisors (507732472).

681613226 is a wasteful number, since it uses less digits than its factorization.

681613226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955253 (or 6955246 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 681613226 is about 26107.7234932500. The cubic root of 681613226 is about 880.0607852296.

The spelling of 681613226 in words is "six hundred eighty-one million, six hundred thirteen thousand, two hundred twenty-six".