681705358 has 16 divisors (see below), whose sum is σ = 1038147840. Its totient is φ = 335692000.

The previous prime is 681705331. The next prime is 681705377. The reversal of 681705358 is 853507186.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 29748 + ... + 47416.

It is an arithmetic number, because the mean of its divisors is an integer number (64884240).

Almost surely, 2^681705358 is an apocalyptic number.

681705358 is a deficient number, since it is larger than the sum of its proper divisors (356442482).

681705358 is a wasteful number, since it uses less digits than its factorization.

681705358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17963.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 681705358 is about 26109.4878923352. The cubic root of 681705358 is about 880.1004353343.

The spelling of 681705358 in words is "six hundred eighty-one million, seven hundred five thousand, three hundred fifty-eight".