256621045773632 has 56 divisors (see below), whose sum is σ = 510839120210496. Its totient is φ = 127905878504448.

The previous prime is 256621045773583. The next prime is 256621045773647. The reversal of 256621045773632 is 236377540126652.

It is a super-2 number, since 2×256621045773632² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79996973 + ... + 83142995.

It is an arithmetic number, because the mean of its divisors is an integer number (9122127146616).

Almost surely, 2^{256621045773632} is an apocalyptic number.

It is an amenable number.

256621045773632 is a deficient number, since it is larger than the sum of its proper divisors (254218074436864).

256621045773632 is a wasteful number, since it uses less digits than its factorization.

256621045773632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150055 (or 3150045 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 59.

The spelling of 256621045773632 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, forty-five million, seven hundred seventy-three thousand, six hundred thirty-two".