681755084008 has 8 divisors (see below), whose sum is σ = 1278290782530. Its totient is φ = 340877542000.

The previous prime is 681755083979. The next prime is 681755084009. The reversal of 681755084008 is 800480557186.

681755084008 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., 651639646564 + 30115437444 = 807242^2 + 173538^2 .

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

It is not an unprimeable number, because it can be changed into a prime (681755084009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42609692743 + ... + 42609692758.

Almost surely, 2^681755084008 is an apocalyptic number.

It is an amenable number.

681755084008 is a deficient number, since it is larger than the sum of its proper divisors (596535698522).

681755084008 is a wasteful number, since it uses less digits than its factorization.

681755084008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85219385507 (or 85219385503 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 681755084008 in words is "six hundred eighty-one billion, seven hundred fifty-five million, eighty-four thousand, eight".