681456341124 has 36 divisors (see below), whose sum is σ = 1855075596556. Its totient is φ = 209678874048.

The previous prime is 681456341119. The next prime is 681456341213. The reversal of 681456341124 is 421143654186.

681456341124 is a `hidden beast` number, since 6 + 8 + 1 + 4 + 5 + 634 + 1 + 1 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49164192900 + 632292148224 = 221730^2 + 795168^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 681456341124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728051179 + ... + 728052114.

Almost surely, 2^681456341124 is an apocalyptic number.

It is an amenable number.

681456341124 is an abundant number, since it is smaller than the sum of its proper divisors (1173619255432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681456341124 is a wasteful number, since it uses less digits than its factorization.

681456341124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456103316 (or 1456103311 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 681456341124 in words is "six hundred eighty-one billion, four hundred fifty-six million, three hundred forty-one thousand, one hundred twenty-four".