681456341123 has 4 divisors (see below), whose sum is σ = 717322464360. Its totient is φ = 645590217888.

The previous prime is 681456341119. The next prime is 681456341213. The reversal of 681456341123 is 321143654186.

681456341123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681456341123 - 2² = 681456341119 is a prime.

It is a super-2 number, since 2×681456341123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681456343123) 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, 17933061590 + ... + 17933061627.

It is an arithmetic number, because the mean of its divisors is an integer number (179330616090).

Almost surely, 2^681456341123 is an apocalyptic number.

681456341123 is a deficient number, since it is larger than the sum of its proper divisors (35866123237).

681456341123 is a wasteful number, since it uses less digits than its factorization.

681456341123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35866123236.

The product of its digits is 414720, while the sum is 44.

The spelling of 681456341123 in words is "six hundred eighty-one billion, four hundred fifty-six million, three hundred forty-one thousand, one hundred twenty-three".