261452163 has 32 divisors (see below), whose sum is σ = 424521216. Its totient is φ = 139719168.

The previous prime is 261452153. The next prime is 261452167. The reversal of 261452163 is 361254162.

It is not a de Polignac number, because 261452163 - 2¹⁸ = 261190019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261452163.

It is not an unprimeable number, because it can be changed into a prime (261452167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55945 + ... + 60437.

It is an arithmetic number, because the mean of its divisors is an integer number (13266288).

Almost surely, 2^261452163 is an apocalyptic number.

261452163 is a deficient number, since it is larger than the sum of its proper divisors (163069053).

261452163 is a wasteful number, since it uses less digits than its factorization.

261452163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683.

The product of its digits is 8640, while the sum is 30.

The square root of 261452163 is about 16169.4824592502. The cubic root of 261452163 is about 639.4364855842.

The spelling of 261452163 in words is "two hundred sixty-one million, four hundred fifty-two thousand, one hundred sixty-three".