681909070909180 has 192 divisors, whose sum is σ = 1517527763136000. Its totient is φ = 256947094010880.

The previous prime is 681909070909147. The next prime is 681909070909181. The reversal of 681909070909180 is 81909070909186.

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 63 ways as a sum of consecutive naturals, for example, 115128997699 + ... + 115129003621.

It is an arithmetic number, because the mean of its divisors is an integer number (7903790433000).

Almost surely, 2^{681909070909180} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681909070909180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758763881568000).

681909070909180 is an abundant number, since it is smaller than the sum of its proper divisors (835618692226820).

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

681909070909180 is a wasteful number, since it uses less digits than its factorization.

681909070909180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364 (or 10362 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 67.

The spelling of 681909070909180 in words is "six hundred eighty-one trillion, nine hundred nine billion, seventy million, nine hundred nine thousand, one hundred eighty".