681497577 has 16 divisors (see below), whose sum is σ = 1010990080. Its totient is φ = 453717936.

The previous prime is 681497563. The next prime is 681497587. The reversal of 681497577 is 775794186.

681497577 is a `hidden beast` number, since 6 + 81 + 497 + 5 + 77 = 666.

It is not a de Polignac number, because 681497577 - 2¹⁹ = 680973289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681497507) 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 15 ways as a sum of consecutive naturals, for example, 3768 + ... + 37110.

It is an arithmetic number, because the mean of its divisors is an integer number (63186880).

Almost surely, 2^681497577 is an apocalyptic number.

It is an amenable number.

681497577 is a deficient number, since it is larger than the sum of its proper divisors (329492503).

681497577 is a wasteful number, since it uses less digits than its factorization.

681497577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34109 (or 34103 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 681497577 is about 26105.5085566246. The cubic root of 681497577 is about 880.0110092459.

The spelling of 681497577 in words is "six hundred eighty-one million, four hundred ninety-seven thousand, five hundred seventy-seven".