259561965 has 64 divisors (see below), whose sum is σ = 462422016. Its totient is φ = 123524352.

The previous prime is 259561943. The next prime is 259561997. The reversal of 259561965 is 569165952.

It is not a de Polignac number, because 259561965 - 2¹⁰ = 259560941 is a prime.

It is a super-2 number, since 2×259561965² = 134744827349322450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1163844 + ... + 1164066.

It is an arithmetic number, because the mean of its divisors is an integer number (7225344).

Almost surely, 2^259561965 is an apocalyptic number.

It is an amenable number.

259561965 is a deficient number, since it is larger than the sum of its proper divisors (202860051).

259561965 is a wasteful number, since it uses less digits than its factorization.

259561965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418.

The product of its digits is 729000, while the sum is 48.

The square root of 259561965 is about 16110.9268820884. The cubic root of 259561965 is about 637.8917976047.

The spelling of 259561965 in words is "two hundred fifty-nine million, five hundred sixty-one thousand, nine hundred sixty-five".