681180863 has 8 divisors (see below), whose sum is σ = 744337920. Its totient is φ = 618229080.

The previous prime is 681180853. The next prime is 681180943. The reversal of 681180863 is 368081186.

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 681180863 - 2⁸ = 681180607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681180863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681180833) 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, 44333 + ... + 57686.

It is an arithmetic number, because the mean of its divisors is an integer number (93042240).

Almost surely, 2^681180863 is an apocalyptic number.

681180863 is a deficient number, since it is larger than the sum of its proper divisors (63157057).

681180863 is a wasteful number, since it uses less digits than its factorization.

681180863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102637.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 681180863 is about 26099.4418139546. The cubic root of 681180863 is about 879.8746649150.

The spelling of 681180863 in words is "six hundred eighty-one million, one hundred eighty thousand, eight hundred sixty-three".