681048008021 has 8 divisors (see below), whose sum is σ = 689348321760. Its totient is φ = 672749954352.

The previous prime is 681048008009. The next prime is 681048008041. The reversal of 681048008021 is 120800840186.

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 681048008021 - 2³⁰ = 679974266197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681048008041) 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, 45326 + ... + 1167968.

It is an arithmetic number, because the mean of its divisors is an integer number (86168540220).

Almost surely, 2^681048008021 is an apocalyptic number.

It is an amenable number.

681048008021 is a deficient number, since it is larger than the sum of its proper divisors (8300313739).

681048008021 is a wasteful number, since it uses less digits than its factorization.

681048008021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130035.

The product of its (nonzero) digits is 24576, while the sum is 38.

The spelling of 681048008021 in words is "six hundred eighty-one billion, forty-eight million, eight thousand, twenty-one".