681736612 has 12 divisors (see below), whose sum is σ = 1200941056. Its totient is φ = 338610600.

The previous prime is 681736607. The next prime is 681736613. The reversal of 681736612 is 216637186.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (681736613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 563748 + ... + 564955.

Almost surely, 2^681736612 is an apocalyptic number.

It is an amenable number.

681736612 is a deficient number, since it is larger than the sum of its proper divisors (519204444).

681736612 is a wasteful number, since it uses less digits than its factorization.

681736612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128858 (or 1128856 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 681736612 is about 26110.0864035338. The cubic root of 681736612 is about 880.1138850543.

The spelling of 681736612 in words is "six hundred eighty-one million, seven hundred thirty-six thousand, six hundred twelve".