671211380736 has 672 divisors, whose sum is σ = 2227119699168. Its totient is φ = 200658124800.

The previous prime is 671211380711. The next prime is 671211380737. The reversal of 671211380736 is 637083112176.

It is a junction number, because it is equal to n+sod(n) for n = 671211380691 and 671211380700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671211380737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 957505186 + ... + 957505886.

It is an arithmetic number, because the mean of its divisors is an integer number (3314166219).

Almost surely, 2^671211380736 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 671211380736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113559849584).

671211380736 is an abundant number, since it is smaller than the sum of its proper divisors (1555908318432).

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

671211380736 is an equidigital number, since it uses as much as digits as its factorization.

671211380736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 671211380736 in words is "six hundred seventy-one billion, two hundred eleven million, three hundred eighty thousand, seven hundred thirty-six".