681831874585 has 8 divisors (see below), whose sum is σ = 818222682816. Its totient is φ = 545449210800.

The previous prime is 681831874547. The next prime is 681831874597. The reversal of 681831874585 is 585478138186.

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

It is not a de Polignac number, because 681831874585 - 2¹³ = 681831866393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850391 + ... + 2188060.

It is an arithmetic number, because the mean of its divisors is an integer number (102277835352).

Almost surely, 2^681831874585 is an apocalyptic number.

It is an amenable number.

681831874585 is a deficient number, since it is larger than the sum of its proper divisors (136390808231).

681831874585 is a wasteful number, since it uses less digits than its factorization.

681831874585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4072223.

The product of its digits is 51609600, while the sum is 64.

The spelling of 681831874585 in words is "six hundred eighty-one billion, eight hundred thirty-one million, eight hundred seventy-four thousand, five hundred eighty-five".