681881848032 has 384 divisors, whose sum is σ = 2295029818368. Its totient is φ = 172092211200.

The previous prime is 681881848013. The next prime is 681881848049. The reversal of 681881848032 is 230848188186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298938732 + ... + 298941012.

It is an arithmetic number, because the mean of its divisors is an integer number (5976640152).

Almost surely, 2^681881848032 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 681881848032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1147514909184).

681881848032 is an abundant number, since it is smaller than the sum of its proper divisors (1613147970336).

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

681881848032 is a wasteful number, since it uses less digits than its factorization.

681881848032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3434 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 57.

The spelling of 681881848032 in words is "six hundred eighty-one billion, eight hundred eighty-one million, eight hundred forty-eight thousand, thirty-two".