1681567344 has 80 divisors (see below), whose sum is σ = 4832205600. Its totient is φ = 559885824.

The previous prime is 1681567271. The next prime is 1681567361. The reversal of 1681567344 is 4437651861.

1681567344 is a `hidden beast` number, since 1 + 6 + 81 + 567 + 3 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1681567344.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522412 + ... + 525620.

It is an arithmetic number, because the mean of its divisors is an integer number (60402570).

Almost surely, 2^1681567344 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 1681567344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416102800).

1681567344 is an abundant number, since it is smaller than the sum of its proper divisors (3150638256).

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

1681567344 is a wasteful number, since it uses less digits than its factorization.

1681567344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439 (or 4427 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1681567344 is about 41006.9182455839. The cubic root of 1681567344 is about 1189.1539649478.

The spelling of 1681567344 in words is "one billion, six hundred eighty-one million, five hundred sixty-seven thousand, three hundred forty-four".