256621120300756 has 6 divisors (see below), whose sum is σ = 449086960526330. Its totient is φ = 128310560150376.

The previous prime is 256621120300717. The next prime is 256621120300777. The reversal of 256621120300756 is 657003021126652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 201642840010000 + 54978280290756 = 14200100^2 + 7414734^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32077640037591 + ... + 32077640037598.

Almost surely, 2^{256621120300756} is an apocalyptic number.

It is an amenable number.

256621120300756 is a deficient number, since it is larger than the sum of its proper divisors (192465840225574).

256621120300756 is a wasteful number, since it uses less digits than its factorization.

256621120300756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64155280075193 (or 64155280075191 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 256621120300756 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, one hundred twenty million, three hundred thousand, seven hundred fifty-six".