261128488430 has 16 divisors (see below), whose sum is σ = 471635486784. Its totient is φ = 104094904800.

The previous prime is 261128488399. The next prime is 261128488433. The reversal of 261128488430 is 34884821162.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261128488433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44558246 + ... + 44564105.

It is an arithmetic number, because the mean of its divisors is an integer number (29477217924).

Almost surely, 2^261128488430 is an apocalyptic number.

261128488430 is a deficient number, since it is larger than the sum of its proper divisors (210506998354).

261128488430 is a wasteful number, since it uses less digits than its factorization.

261128488430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89122651.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 261128488430 in words is "two hundred sixty-one billion, one hundred twenty-eight million, four hundred eighty-eight thousand, four hundred thirty".