256087808605 has 8 divisors (see below), whose sum is σ = 307320862464. Its totient is φ = 204859918800.

The previous prime is 256087808591. The next prime is 256087808611. The reversal of 256087808605 is 506808780652.

It is a happy number.

256087808605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256087808605 - 2¹⁷ = 256087677533 is a prime.

It is a super-2 number, since 2×256087808605² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 1181061 + ... + 1380970.

It is an arithmetic number, because the mean of its divisors is an integer number (38415107808).

Almost surely, 2^256087808605 is an apocalyptic number.

It is an amenable number.

256087808605 is a deficient number, since it is larger than the sum of its proper divisors (51233053859).

256087808605 is a wasteful number, since it uses less digits than its factorization.

256087808605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582027.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 256087808605 in words is "two hundred fifty-six billion, eighty-seven million, eight hundred eight thousand, six hundred five".