681481414657 has 8 divisors (see below), whose sum is σ = 689381937152. Its totient is φ = 673620494400.

The previous prime is 681481414643. The next prime is 681481414661. The reversal of 681481414657 is 756414184186.

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 681481414657 - 2¹⁹ = 681480890369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681481414598 and 681481414607.

It is not an unprimeable number, because it can be changed into a prime (681481414457) 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, 9865944 + ... + 9934777.

It is an arithmetic number, because the mean of its divisors is an integer number (86172742144).

Almost surely, 2^681481414657 is an apocalyptic number.

It is an amenable number.

681481414657 is a deficient number, since it is larger than the sum of its proper divisors (7900522495).

681481414657 is a wasteful number, since it uses less digits than its factorization.

681481414657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19801119.

The product of its digits is 5160960, while the sum is 55.

The spelling of 681481414657 in words is "six hundred eighty-one billion, four hundred eighty-one million, four hundred fourteen thousand, six hundred fifty-seven".