680811865344 has 432 divisors, whose sum is σ = 2200473105600. Its totient is φ = 207519916032.

The previous prime is 680811865337. The next prime is 680811865403. The reversal of 680811865344 is 443568118086.

It is a tau number, because it is divible by the number of its divisors (432).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127323279 + ... + 127328625.

Almost surely, 2^680811865344 is an apocalyptic number.

680811865344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680811865344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100236552800).

680811865344 is an abundant number, since it is smaller than the sum of its proper divisors (1519661240256).

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

680811865344 is a wasteful number, since it uses less digits than its factorization.

680811865344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507 (or 5474 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 680811865344 in words is "six hundred eighty billion, eight hundred eleven million, eight hundred sixty-five thousand, three hundred forty-four".