681488141904 has 120 divisors (see below), whose sum is σ = 1981205694720. Its totient is φ = 224286349248.

The previous prime is 681488141891. The next prime is 681488141909. The reversal of 681488141904 is 409141884186.

681488141904 is a `hidden beast` number, since 6 + 8 + 148 + 81 + 419 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681488141909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2569729 + ... + 2822495.

It is an arithmetic number, because the mean of its divisors is an integer number (16510047456).

Almost surely, 2^681488141904 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 681488141904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990602847360).

681488141904 is an abundant number, since it is smaller than the sum of its proper divisors (1299717552816).

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

681488141904 is a wasteful number, since it uses less digits than its factorization.

681488141904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252942 (or 252851 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The spelling of 681488141904 in words is "six hundred eighty-one billion, four hundred eighty-eight million, one hundred forty-one thousand, nine hundred four".