681909070909184 has 36 divisors (see below), whose sum is σ = 1361167825682616. Its totient is φ = 340951181110272.

The previous prime is 681909070909181. The next prime is 681909070909207. The reversal of 681909070909184 is 481909070909186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681909070909181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13071122 + ... + 39174894.

Almost surely, 2^{681909070909184} is an apocalyptic number.

681909070909184 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

681909070909184 is a deficient number, since it is larger than the sum of its proper divisors (679258754773432).

681909070909184 is a wasteful number, since it uses less digits than its factorization.

681909070909184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26205832 (or 26205818 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 71.

The spelling of 681909070909184 in words is "six hundred eighty-one trillion, nine hundred nine billion, seventy million, nine hundred nine thousand, one hundred eighty-four".