261134163 has 6 divisors (see below), whose sum is σ = 377193804. Its totient is φ = 174089436.

The previous prime is 261134129. The next prime is 261134189. The reversal of 261134163 is 361431162.

261134163 is a `hidden beast` number, since 2 + 611 + 3 + 41 + 6 + 3 = 666.

It is not a de Polignac number, because 261134163 - 2¹⁶ = 261068627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261134113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14507445 + ... + 14507462.

It is an arithmetic number, because the mean of its divisors is an integer number (62865634).

Almost surely, 2^261134163 is an apocalyptic number.

261134163 is a deficient number, since it is larger than the sum of its proper divisors (116059641).

261134163 is a wasteful number, since it uses less digits than its factorization.

261134163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29014913 (or 29014910 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 261134163 is about 16159.6461285512. The cubic root of 261134163 is about 639.1771350197.

It can be divided in two parts, 26113 and 4163, that added together give a square (30276 = 174²).

The spelling of 261134163 in words is "two hundred sixty-one million, one hundred thirty-four thousand, one hundred sixty-three".