681502577 has 8 divisors (see below), whose sum is σ = 781892736. Its totient is φ = 581870592.

The previous prime is 681502561. The next prime is 681502589. The reversal of 681502577 is 775205186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681502577 - 2⁴ = 681502561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681502177) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 187613 + ... + 191210.

It is an arithmetic number, because the mean of its divisors is an integer number (97736592).

Almost surely, 2^681502577 is an apocalyptic number.

It is an amenable number.

681502577 is a deficient number, since it is larger than the sum of its proper divisors (100390159).

681502577 is a wasteful number, since it uses less digits than its factorization.

681502577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379087.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 681502577 is about 26105.6043216777. The cubic root of 681502577 is about 880.0131613906.

The spelling of 681502577 in words is "six hundred eighty-one million, five hundred two thousand, five hundred seventy-seven".