681110498173 has 4 divisors (see below), whose sum is σ = 778411997920. Its totient is φ = 583808998428.

The previous prime is 681110498171. The next prime is 681110498213. The reversal of 681110498173 is 371894011186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681110498173 - 2¹ = 681110498171 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 (681110498171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48650749863 + ... + 48650749876.

It is an arithmetic number, because the mean of its divisors is an integer number (194602999480).

Almost surely, 2^681110498173 is an apocalyptic number.

It is an amenable number.

681110498173 is a deficient number, since it is larger than the sum of its proper divisors (97301499747).

681110498173 is an equidigital number, since it uses as much as digits as its factorization.

681110498173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97301499746.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 681110498173 in words is "six hundred eighty-one billion, one hundred ten million, four hundred ninety-eight thousand, one hundred seventy-three".