681507436 has 6 divisors (see below), whose sum is σ = 1192638020. Its totient is φ = 340753716.

The previous prime is 681507427. The next prime is 681507467. The reversal of 681507436 is 634705186.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85188426 + ... + 85188433.

Almost surely, 2^681507436 is an apocalyptic number.

It is an amenable number.

681507436 is a deficient number, since it is larger than the sum of its proper divisors (511130584).

681507436 is a wasteful number, since it uses less digits than its factorization.

681507436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170376863 (or 170376861 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 681507436 is about 26105.6973858198. The cubic root of 681507436 is about 880.0152528348.

The spelling of 681507436 in words is "six hundred eighty-one million, five hundred seven thousand, four hundred thirty-six".