681067755304 has 8 divisors (see below), whose sum is σ = 1277002041210. Its totient is φ = 340533877648.

The previous prime is 681067755299. The next prime is 681067755311. The reversal of 681067755304 is 403557760186.

It is a happy number.

681067755304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 550311748900 + 130756006404 = 741830^2 + 361602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42566734699 + ... + 42566734714.

Almost surely, 2^681067755304 is an apocalyptic number.

It is an amenable number.

681067755304 is a deficient number, since it is larger than the sum of its proper divisors (595934285906).

681067755304 is a wasteful number, since it uses less digits than its factorization.

681067755304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85133469419 (or 85133469415 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 681067755304 in words is "six hundred eighty-one billion, sixty-seven million, seven hundred fifty-five thousand, three hundred four".