671631228032 has 72 divisors (see below), whose sum is σ = 1421685583155. Its totient is φ = 315987578880.

The previous prime is 671631228017. The next prime is 671631228101. The reversal of 671631228032 is 230822136176.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 663338575936 + 8292652096 = 814456^2 + 91064^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=579496.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 157620782 + ... + 157625042.

Almost surely, 2^671631228032 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 671631228032

671631228032 is an abundant number, since it is smaller than the sum of its proper divisors (750054355123).

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

671631228032 is an frugal number, since it uses more digits than its factorization.

671631228032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8570 (or 4280 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 671631228032 in words is "six hundred seventy-one billion, six hundred thirty-one million, two hundred twenty-eight thousand, thirty-two".