261441642110 has 128 divisors (see below), whose sum is σ = 534740963328. Its totient is φ = 91212480000.

The previous prime is 261441642103. The next prime is 261441642139. The reversal of 261441642110 is 11246144162.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53781080 + ... + 53785940.

It is an arithmetic number, because the mean of its divisors is an integer number (4177663776).

Almost surely, 2^261441642110 is an apocalyptic number.

261441642110 is an abundant number, since it is smaller than the sum of its proper divisors (273299321218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261441642110 is a wasteful number, since it uses less digits than its factorization.

261441642110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 261441642110 its reverse (11246144162), we get a palindrome (272687786272).

The spelling of 261441642110 in words is "two hundred sixty-one billion, four hundred forty-one million, six hundred forty-two thousand, one hundred ten".