681489422881 has 8 divisors (see below), whose sum is σ = 698206963104. Its totient is φ = 664776446880.

The previous prime is 681489422879. The next prime is 681489422893. The reversal of 681489422881 is 188224984186.

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

It is not a de Polignac number, because 681489422881 - 2¹ = 681489422879 is a prime.

It is a super-2 number, since 2×681489422881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681489452881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837795 + ... + 1436968.

It is an arithmetic number, because the mean of its divisors is an integer number (87275870388).

Almost surely, 2^681489422881 is an apocalyptic number.

It is an amenable number.

681489422881 is a deficient number, since it is larger than the sum of its proper divisors (16717540223).

681489422881 is a wasteful number, since it uses less digits than its factorization.

681489422881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282111.

The product of its digits is 14155776, while the sum is 61.

The spelling of 681489422881 in words is "six hundred eighty-one billion, four hundred eighty-nine million, four hundred twenty-two thousand, eight hundred eighty-one".