261652113 has 10 divisors (see below), whose sum is σ = 390863154. Its totient is φ = 174434688.

The previous prime is 261652103. The next prime is 261652133. The reversal of 261652113 is 311256162.

261652113 is a `hidden beast` number, since 2 + 6 + 1 + 652 + 1 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 233264529 + 28387584 = 15273^2 + 5328^2 .

It is not a de Polignac number, because 261652113 - 2⁵ = 261652081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (261652103) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1615056 + ... + 1615217.

Almost surely, 2^261652113 is an apocalyptic number.

It is an amenable number.

261652113 is a deficient number, since it is larger than the sum of its proper divisors (129211041).

261652113 is an equidigital number, since it uses as much as digits as its factorization.

261652113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230285 (or 3230276 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261652113 is about 16175.6642212924. The cubic root of 261652113 is about 639.5994506998.

The spelling of 261652113 in words is "two hundred sixty-one million, six hundred fifty-two thousand, one hundred thirteen".