681340000128 has 64 divisors (see below), whose sum is σ = 1810018396800. Its totient is φ = 227087103488.

The previous prime is 681340000079. The next prime is 681340000147. The reversal of 681340000128 is 821000043186.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380725 + ... + 3576587.

It is an arithmetic number, because the mean of its divisors is an integer number (28281537450).

Almost surely, 2^681340000128 is an apocalyptic number.

It is an amenable number.

681340000128 is an abundant number, since it is smaller than the sum of its proper divisors (1128678396672).

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

681340000128 is a wasteful number, since it uses less digits than its factorization.

681340000128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204939 (or 204927 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 681340000128 in words is "six hundred eighty-one billion, three hundred forty million, one hundred twenty-eight", and thus it is an aban number.