671756700256 has 96 divisors (see below), whose sum is σ = 1389609768960. Its totient is φ = 319237939200.

The previous prime is 671756700239. The next prime is 671756700301. The reversal of 671756700256 is 652007657176.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71223861 + ... + 71233291.

It is an arithmetic number, because the mean of its divisors is an integer number (14475101760).

Almost surely, 2^671756700256 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 671756700256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694804884480).

671756700256 is an abundant number, since it is smaller than the sum of its proper divisors (717853068704).

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

671756700256 is a wasteful number, since it uses less digits than its factorization.

671756700256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10748 (or 10740 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 671756700256 in words is "six hundred seventy-one billion, seven hundred fifty-six million, seven hundred thousand, two hundred fifty-six".