261088659 has 24 divisors (see below), whose sum is σ = 408517200. Its totient is φ = 159728832.

The previous prime is 261088651. The next prime is 261088679. The reversal of 261088659 is 956880162.

It is not a de Polignac number, because 261088659 - 2³ = 261088651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261088651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13792 + ... + 26690.

It is an arithmetic number, because the mean of its divisors is an integer number (17021550).

Almost surely, 2^261088659 is an apocalyptic number.

261088659 is a deficient number, since it is larger than the sum of its proper divisors (147428541).

261088659 is a wasteful number, since it uses less digits than its factorization.

261088659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13091 (or 13088 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 261088659 is about 16158.2381155867. The cubic root of 261088659 is about 639.1400062049.

The spelling of 261088659 in words is "two hundred sixty-one million, eighty-eight thousand, six hundred fifty-nine".