671540914576 has 225 divisors, whose sum is σ = 1573931788611. Its totient is φ = 277546687488.

The previous prime is 671540914573. The next prime is 671540914717. The reversal of 671540914576 is 675419045176.

The square root of 671540914576 is 819476.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 25767954576 + 645772960000 = 160524^2 + 803600^2 .

It is not an unprimeable number, because it can be changed into a prime (671540914571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5942839896 + ... + 5942840008.

Almost surely, 2^671540914576 is an apocalyptic number.

671540914576 is the 819476-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671540914576

671540914576 is an abundant number, since it is smaller than the sum of its proper divisors (902390874035).

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

671540914576 is an frugal number, since it uses more digits than its factorization.

671540914576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 671540914576 in words is "six hundred seventy-one billion, five hundred forty million, nine hundred fourteen thousand, five hundred seventy-six".