671319636 has 48 divisors (see below), whose sum is σ = 1692132288. Its totient is φ = 205920000.

The previous prime is 671319619. The next prime is 671319679. The reversal of 671319636 is 636913176.

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, 45136 + ... + 58136.

It is an arithmetic number, because the mean of its divisors is an integer number (35252756).

Almost surely, 2^671319636 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 671319636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846066144).

671319636 is an abundant number, since it is smaller than the sum of its proper divisors (1020812652).

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

671319636 is a wasteful number, since it uses less digits than its factorization.

671319636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352 (or 13350 counting only the distinct ones).

The product of its digits is 122472, while the sum is 42.

The square root of 671319636 is about 25909.8366648653. The cubic root of 671319636 is about 875.6081262603.

It can be divided in two parts, 67131 and 9636, that added together give a palindrome (76767).

The spelling of 671319636 in words is "six hundred seventy-one million, three hundred nineteen thousand, six hundred thirty-six".