681244755530 has 32 divisors (see below), whose sum is σ = 1228398732288. Its totient is φ = 272018483200.

The previous prime is 681244755511. The next prime is 681244755571. The reversal of 681244755530 is 35557442186.

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 15 ways as a sum of consecutive naturals, for example, 51984959 + ... + 51998061.

It is an arithmetic number, because the mean of its divisors is an integer number (38387460384).

Almost surely, 2^681244755530 is an apocalyptic number.

681244755530 is a deficient number, since it is larger than the sum of its proper divisors (547153976758).

681244755530 is a wasteful number, since it uses less digits than its factorization.

681244755530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21862.

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 681244755530 in words is "six hundred eighty-one billion, two hundred forty-four million, seven hundred fifty-five thousand, five hundred thirty".