259109328385 has 4 divisors (see below), whose sum is σ = 310931194068. Its totient is φ = 207287462704.

The previous prime is 259109328323. The next prime is 259109328407. The reversal of 259109328385 is 583823901952.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 119298396816 + 139810931569 = 345396^2 + 373913^2 .

It is a cyclic number.

It is not a de Polignac number, because 259109328385 - 2¹¹ = 259109326337 is a prime.

It is a super-2 number, since 2×259109328385² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25910932834 + ... + 25910932843.

It is an arithmetic number, because the mean of its divisors is an integer number (77732798517).

Almost surely, 2^259109328385 is an apocalyptic number.

It is an amenable number.

259109328385 is a deficient number, since it is larger than the sum of its proper divisors (51821865683).

259109328385 is an equidigital number, since it uses as much as digits as its factorization.

259109328385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51821865682.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 259109328385 in words is "two hundred fifty-nine billion, one hundred nine million, three hundred twenty-eight thousand, three hundred eighty-five".