259645663631 has 16 divisors (see below), whose sum is σ = 271454549184. Its totient is φ = 247880607744.

The previous prime is 259645663619. The next prime is 259645663637. The reversal of 259645663631 is 136366546952.

It is a de Polignac number, because none of the positive numbers 2^k-259645663631 is a prime.

It is a super-2 number, since 2×259645663631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259645663637) 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, 28350305 + ... + 28359461.

It is an arithmetic number, because the mean of its divisors is an integer number (16965909324).

Almost surely, 2^259645663631 is an apocalyptic number.

259645663631 is a deficient number, since it is larger than the sum of its proper divisors (11808885553).

259645663631 is a wasteful number, since it uses less digits than its factorization.

259645663631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11410.

The product of its digits is 20995200, while the sum is 56.

The spelling of 259645663631 in words is "two hundred fifty-nine billion, six hundred forty-five million, six hundred sixty-three thousand, six hundred thirty-one".