681885546641 has 8 divisors (see below), whose sum is σ = 734422819200. Its totient is φ = 629360350992.

The previous prime is 681885546637. The next prime is 681885546649. The reversal of 681885546641 is 146645588186.

681885546641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 681885546641 - 2² = 681885546637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681885546649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2901785 + ... + 3127958.

It is an arithmetic number, because the mean of its divisors is an integer number (91802852400).

Almost surely, 2^681885546641 is an apocalyptic number.

It is an amenable number.

681885546641 is a deficient number, since it is larger than the sum of its proper divisors (52537272559).

681885546641 is a wasteful number, since it uses less digits than its factorization.

681885546641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038455.

The product of its digits is 44236800, while the sum is 62.

The spelling of 681885546641 in words is "six hundred eighty-one billion, eight hundred eighty-five million, five hundred forty-six thousand, six hundred forty-one".