261641107 has 16 divisors (see below), whose sum is σ = 325350592. Its totient is φ = 204871680.

The previous prime is 261641087. The next prime is 261641113. The reversal of 261641107 is 701146162.

It is not a de Polignac number, because 261641107 - 2²⁷ = 127423379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261641137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5994 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (20334412).

Almost surely, 2^261641107 is an apocalyptic number.

261641107 is a deficient number, since it is larger than the sum of its proper divisors (63709485).

261641107 is a wasteful number, since it uses less digits than its factorization.

261641107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29758.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 261641107 is about 16175.3240153018. The cubic root of 261641107 is about 639.5904826466.

Adding to 261641107 its reverse (701146162), we get a palindrome (962787269).

The spelling of 261641107 in words is "two hundred sixty-one million, six hundred forty-one thousand, one hundred seven".