259785885287 has 4 divisors (see below), whose sum is σ = 259790386296. Its totient is φ = 259781384280.

The previous prime is 259785885269. The next prime is 259785885343. The reversal of 259785885287 is 782588587952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259785885287 - 2¹⁶ = 259785819751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259785885487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2162789 + ... + 2279742.

It is an arithmetic number, because the mean of its divisors is an integer number (64947596574).

Almost surely, 2^259785885287 is an apocalyptic number.

259785885287 is a deficient number, since it is larger than the sum of its proper divisors (4501009).

259785885287 is an equidigital number, since it uses as much as digits as its factorization.

259785885287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501008.

The product of its digits is 903168000, while the sum is 74.

The spelling of 259785885287 in words is "two hundred fifty-nine billion, seven hundred eighty-five million, eight hundred eighty-five thousand, two hundred eighty-seven".