255905890009 has 16 divisors (see below), whose sum is σ = 319480980480. Its totient is φ = 199138761360.

The previous prime is 255905889991. The next prime is 255905890013. The reversal of 255905890009 is 900098509552.

It is a happy number.

It is not a de Polignac number, because 255905890009 - 2¹¹ = 255905887961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255905890069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179299 + ... + 2293720.

It is an arithmetic number, because the mean of its divisors is an integer number (19967561280).

Almost surely, 2^255905890009 is an apocalyptic number.

It is an amenable number.

255905890009 is a deficient number, since it is larger than the sum of its proper divisors (63575090471).

255905890009 is a wasteful number, since it uses less digits than its factorization.

255905890009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473780.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 255905890009 in words is "two hundred fifty-five billion, nine hundred five million, eight hundred ninety thousand, nine".