671508636832 has 72 divisors (see below), whose sum is σ = 1459808148960. Its totient is φ = 301552625280.

The previous prime is 671508636811. The next prime is 671508636839. The reversal of 671508636832 is 238636805176.

It is not an unprimeable number, because it can be changed into a prime (671508636839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2286469 + ... + 2563387.

It is an arithmetic number, because the mean of its divisors is an integer number (20275113180).

Almost surely, 2^671508636832 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 671508636832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729904074480).

671508636832 is an abundant number, since it is smaller than the sum of its proper divisors (788299512128).

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

671508636832 is a wasteful number, since it uses less digits than its factorization.

671508636832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277106 (or 277015 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 671508636832 in words is "six hundred seventy-one billion, five hundred eight million, six hundred thirty-six thousand, eight hundred thirty-two".