671968522662912 has 264 divisors, whose sum is σ = 1965582011502720. Its totient is φ = 221079239884800.

The previous prime is 671968522662887. The next prime is 671968522662953. The reversal of 671968522662912 is 219266225869176.

671968522662912 is a `hidden beast` number, since 6 + 7 + 1 + 9 + 6 + 8 + 522 + 6 + 6 + 2 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

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, 461058537 + ... + 462513687.

Almost surely, 2^{671968522662912} 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 671968522662912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982791005751360).

671968522662912 is an abundant number, since it is smaller than the sum of its proper divisors (1293613488839808).

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

671968522662912 is a wasteful number, since it uses less digits than its factorization.

671968522662912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455829 (or 1455808 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 72.

The spelling of 671968522662912 in words is "six hundred seventy-one trillion, nine hundred sixty-eight billion, five hundred twenty-two million, six hundred sixty-two thousand, nine hundred twelve".