261160655 has 16 divisors (see below), whose sum is σ = 359261184. Its totient is φ = 178532640.

The previous prime is 261160637. The next prime is 261160657. The reversal of 261160655 is 556061162.

It is not a de Polignac number, because 261160655 - 2²⁰ = 260112079 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 (261160657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314 + ... + 22856.

It is an arithmetic number, because the mean of its divisors is an integer number (22453824).

Almost surely, 2^261160655 is an apocalyptic number.

261160655 is a deficient number, since it is larger than the sum of its proper divisors (98100529).

261160655 is a wasteful number, since it uses less digits than its factorization.

261160655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22886.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 261160655 is about 16160.4658039303. The cubic root of 261160655 is about 639.1987490792.

The spelling of 261160655 in words is "two hundred sixty-one million, one hundred sixty thousand, six hundred fifty-five".