681124229858 has 6 divisors (see below), whose sum is σ = 1021688095521. Its totient is φ = 340561531352.

The previous prime is 681124229857. The next prime is 681124229897. The reversal of 681124229858 is 858922421186.

It can be written as a sum of positive squares in 2 ways, for example, as 446086402609 + 235037827249 = 667897^2 + 484807^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=583577.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681124229857) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 875366 + ... + 1458942.

Almost surely, 2^681124229858 is an apocalyptic number.

681124229858 is a deficient number, since it is larger than the sum of its proper divisors (340563865663).

681124229858 is an frugal number, since it uses more digits than its factorization.

681124229858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167156 (or 583579 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 56.

The spelling of 681124229858 in words is "six hundred eighty-one billion, one hundred twenty-four million, two hundred twenty-nine thousand, eight hundred fifty-eight".